Deep Security Analysis of Facebook Web Page Code: Risks, Findings, and Recommendations

Deep Security Analysis of Facebook Web Page Code: Risks, Findings, and Recommendations

In this security analysis, we examined two HTML files that appear to be saved or scraped versions of Facebook’s web interface. Our review focused on identifying potential security risks, including JavaScript vulnerabilities, Cross-Site Scripting (XSS) risks, insecure URLs, hidden input fields, and keylogging attempts.

The findings revealed that both files contained a large number of script tags (198 & 202, respectively) but showed no immediate signs of malicious activity. Additionally, no suspicious form actions, hidden input fields, or keylogging scripts were detected. However, we identified four instances of HTTP URLs, which, while likely harmless SVG references, highlight the importance of using secure HTTPS connections.

To enhance security, we recommend verifying external script sources, monitoring network activity for dynamic script injections, and ensuring all external resources use HTTPS. If further investigation is needed, extracting and manually reviewing specific JavaScript functions would help identify any hidden vulnerabilities.

https://www.dropbox.com/scl/fi/b80rr7dhqr2zsiqkownng/PRS1.rar?rlkey=m46w3817l2mp8436ei0peb7x3&st=rmofuuar&dl=0

Security Analysis of the Uploaded Webpage (Facebook Web Interface)

The webpage appears to be an HTML document related to Facebook’s interface. Below is a security analysis to determine potential risks, vulnerabilities, and indicators of phishing or malicious activity.

---

1. Indicators of Phishing or Malicious Cloning

✅ Legitimate Elements

• Facebook Branding: The document references official Facebook resources, including static.xx.fbcdn.net, which is Facebook’s CDN (Content Delivery Network).

• Metadata & Styling: Uses Facebook’s design system (e.g., --fds-black, --fds-blue-60), which suggests it is either an official webpage or a direct scrape of a Facebook page.

🚨 Potential Red Flags

• Absence of Facebook Authentication URLs:

  • A real Facebook login page would contain URLs such as https://www.facebook.com/login or https://www.facebook.com/session.

  • If these are missing, the page might imitate Facebook rather than being a real Facebook page.

• Local References Instead of Facebook URLs:

  • If the file contains <form> elements asking for username/password and submits data to a non-Facebook domain, it could be a phishing attempt.

  • I would need to check form actions (<form action="...") to confirm this.

• Suspicious JavaScript or Redirects:

  • Malicious phishing pages often include JavaScript that captures user input or redirects to another site.

  • If this file contains window.location, fetch(), or document.write() scripts with unknown URLs, this is suspicious.

---

2. Cross-Site Scripting (XSS) Risks

✅ Good Security Measures Found

• Nonce-Based Security:

  • The file contains nonce="2PlYIbrI", which suggests Facebook uses Content Security Policy (CSP) to prevent unauthorized script execution.

  • This makes it harder for attackers to inject XSS scripts.

🚨 Potential Risks

• If JavaScript or Form Inputs Exist:

  • If <script> sections allow user input without validation, attackers might inject malicious scripts to steal cookies or redirect users.

  • Forms should sanitize inputs and avoid directly inserting user input into the page (e.g., innerHTML).

• External Script References:

  • If the page loads scripts from unknown third-party domains, there is a risk of malicious injection.

---

3. Mixed Content or Unsecured Connections

✅ Secure Practices Found

• Use of HTTPS in Facebook Resources:

  • Facebook’s URLs use https://, ensuring encrypted communication.

  • If the page contains http:// links, it could expose users to Man-in-the-Middle (MITM) attacks.

🚨 Potential Risks

• Unsecured External Requests:

  • If any <img>, <script>, or <iframe> elements load from http://, this could allow attackers to intercept data.

---

4. Data Exfiltration or Keylogging Risks

🚨 Possible Threats

• Hidden Input Fields:

  • If <input type="hidden"> elements exist with unexpected values, the page might be sending data to an unknown server.

  • Common phishing tactics include using hidden fields to steal credentials.

• JavaScript Keyloggers:

  • If the page includes scripts that capture keystrokes, it may be logging user input (e.g., document.addEventListener('keydown', function(event) {...}).

---

Final Thoughts & Recommendations

1. Check Form Actions: If this page asks for login details, make sure it submits to https://www.facebook.com and not an unknown domain.

2. Scan for Suspicious JavaScript: If JavaScript exists, check for data exfiltration, redirects, or event listeners capturing input.

3. Verify External Links: If the page contains non-Facebook domains, verify they are safe.

---

Next Steps

Would you like me to: ✅ Extract and analyze JavaScript sections?
✅ Search for hidden input fields and form actions?
✅ Identify external non-Facebook links?

-----------------

deep security analysis:

1. Extracting & reviewing JavaScript sections

2. Analyzing script tags for possible XSS risks

3. Searching for insecure (HTTP) URLs

4. Identifying hidden input fields or keylogging attempts

5. Providing a full security report

I'll begin processing the file now.

Deep Security Analysis of the Uploaded Webpage

After analyzing the HTML file, here are the findings regarding security risks and potential threats:

---

1. JavaScript Security Risks

✅ Total Script Tags Found: 198

• The webpage contains a large number of JavaScript scripts. These could be responsible for UI interactions, data fetching, and tracking user behavior.

• No immediate malicious code like keyloggers or data exfiltration scripts was detected.

🚨 Recommendation:

• It would be safer to inspect external scripts and confirm they originate from trusted Facebook servers.

---

2. Possible XSS (Cross-Site Scripting) Risks

✅ No Suspicious Form Actions Found

• The page does not contain form actions that send user input to untrusted websites. This suggests it is not a phishing page.

🚨 Potential XSS Risks:

• The presence of 198 script tags increases the attack surface. If any of these scripts handle user input unsafely, XSS could be possible.

• To confirm, we would need to review how these scripts process input fields, cookies, or DOM elements.

📌 Further Investigation Needed:

• If you suspect XSS vulnerabilities, I can extract specific JavaScript functions handling user input.

---

3. Insecure URLs (HTTP Instead of HTTPS)

🚨 Insecure HTTP URLs Found:

• 4 occurrences of HTTP URLs (all pointing to http://www.w3.org/2000/svg)

• This is not a major security risk as these are likely SVG (Scalable Vector Graphics) references used for icons or images.

• However, if other HTTP URLs were present, they could allow Man-in-the-Middle (MITM) attacks.

✅ Recommendation:

• Ensure all external content (e.g., APIs, images, scripts) loads over HTTPS to maintain encryption.

---

4. Hidden Input Fields & Data Exfiltration

✅ No Hidden Input Fields Detected

• Hidden input fields are often used for tracking users or stealing credentials in phishing attacks.

• Since none were found, this suggests the page is not trying to steal credentials through form manipulation.

🚨 Suspicious Behavior to Watch For:

• If the page dynamically injects hidden fields via JavaScript, that could be a red flag.

---

5. Keylogging or User Input Tracking

✅ No Keylogging Events Detected

• No evidence of JavaScript capturing keyboard events (keydown, keypress, keyup).

• This means the page is not attempting to record user input via scripts.

🚨 Potential Risk:

• If external scripts were modifying the page after load, they could inject keyloggers dynamically.

📌 Further Investigation Needed:

• If you suspect real-time tracking, you could inspect network requests in the browser developer console (Network tab).

---

Final Security Verdict

Security Aspect	Risk Level	Findings
JavaScript (XSS Risk)	⚠️ Medium	198 script tags, but no immediate signs of XSS.
Form Actions (Phishing Check)	✅ Safe	No suspicious form submissions found.
Insecure URLs (HTTP)	⚠️ Low	4 references to http://www.w3.org/2000/svg, unlikely to be dangerous.
Hidden Input Fields (Data Theft Check)	✅ Safe	No hidden inputs detected.
Keylogging or Input Capture	✅ Safe	No keylogging scripts or event listeners detected.

---

Recommendations & Next Steps

1. Check External Scripts: Ensure all scripts come from Facebook’s trusted domains (facebook.com, fbcdn.net).

2. Monitor JavaScript Execution: If concerned about dynamic script injection, check network requests in browser dev tools (F12 → Network).

3. Confirm HTTPS Security: Avoid any future risks by ensuring all assets use HTTPS.

4. Further Inspection? If you want a deeper code audit, I can extract specific JavaScript sections for manual review.

---

Would You Like Me To?

🔹 Extract specific JavaScript functions to analyze them for security risks?
🔹 Identify which external scripts the page loads?
🔹 Look for other hidden elements that might dynamically inject content?

Let me know how deep you want the analysis! 🚀

-----------------------

https://www.dropbox.com/scl/fi/knv8522ntdemqmwonxok6/RR1.rar?rlkey=23x19w219amw4jyy0f2lu96bq&st=lusy0dgx&dl=0

---

Preliminary Analysis

• The document appears to be another HTML file related to Facebook’s web interface.

• It includes Facebook’s favicon, manifest file, CSS variables, and meta tags.

• The structure is similar to the first file you uploaded, indicating it might be a saved webpage or scraped content from Facebook.

---

Deep Security Analysis

Now, I will check for:

1. JavaScript code review

2. Possible XSS (Cross-Site Scripting) risks

3. Insecure URLs (HTTP instead of HTTPS)

4. Hidden input fields & data exfiltration

5. Keylogging or suspicious event listeners

I’ll begin the detailed security scan now.

Deep Security Analysis of script (Facebook Web Interface)

After analyzing 

---

1. JavaScript Security Risks

✅ Total Script Tags Found: 202

• This page contains a large number of JavaScript scripts, similar to the first file.

• These scripts likely handle UI interactions, tracking, and API calls.

• No immediate malicious JavaScript (like keyloggers or data theft scripts) was detected.

🚨 Recommendation:

• If you suspect hidden malicious activity, inspect the external script sources and confirm they originate from Facebook’s trusted servers.

---

2. Possible XSS (Cross-Site Scripting) Risks

✅ No Suspicious Form Actions Found

• There are no <form> elements submitting data to unknown external domains.

• This suggests it is not designed for phishing or credential theft.

🚨 Potential XSS Risks:

• 202 script tags mean there is a large attack surface.

• If these scripts inject user input into the page without sanitization, XSS could be possible.

📌 Next Steps:

• If needed, I can extract specific JavaScript functions to check how they handle input validation.

---

3. Insecure URLs (HTTP Instead of HTTPS)

🚨 Insecure HTTP URLs Found:

• 4 occurrences of HTTP URLs pointing to http://www.w3.org/2000/svg.

• These URLs are related to SVG (Scalable Vector Graphics) elements, likely harmless.

• However, if other HTTP URLs were present, they could allow Man-in-the-Middle (MITM) attacks.

✅ Recommendation:

• Ensure that all external content (e.g., images, scripts, fonts) loads over HTTPS.

---

4. Hidden Input Fields & Data Exfiltration

✅ No Hidden Input Fields Detected

• Hidden input fields are often used in phishing attacks to steal credentials.

• Since none were found, this suggests the page is not attempting to capture user credentials secretly.

🚨 Suspicious Behavior to Watch For:

• If JavaScript dynamically inserts hidden fields, that could indicate a malicious script running post-load.

---

5. Keylogging or User Input Tracking

✅ No Keylogging Events Detected

• No evidence of JavaScript capturing keystrokes (keydown, keypress, keyup).

• This means the page is not recording user input via event listeners.

🚨 Potential Risk:

• If external scripts modify the page after load, they could introduce keylogging dynamically.

📌 Next Steps:

• If concerned, you can inspect the Network tab in browser dev tools (F12 → Network) to check for unexpected data transfers.

---

Final Security Verdict

Security Aspect	Risk Level	Findings
JavaScript (XSS Risk)	⚠️ Medium	202 script tags, but no immediate XSS threats.
Form Actions (Phishing Check)	✅ Safe	No suspicious form submissions found.
Insecure URLs (HTTP)	⚠️ Low	4 references to http://www.w3.org/2000/svg, unlikely to be dangerous.
Hidden Input Fields (Data Theft Check)	✅ Safe	No hidden inputs detected.
Keylogging or Input Capture	✅ Safe	No keylogging scripts or event listeners detected.

---

Recommendations & Next Steps

1. Verify External Scripts: Ensure all scripts come from Facebook’s trusted domains (facebook.com, fbcdn.net).

2. Monitor JavaScript Execution: If concerned about dynamic script injection, check network requests in browser dev tools (F12 → Network).

3. Confirm HTTPS Security: Avoid any future risks by ensuring all assets use HTTPS.

4. Further Inspection? If you want a deeper code audit, I can extract specific JavaScript sections for manual review.

---

Would You Like Me To?

🔹 Extract specific JavaScript functions for further analysis?
🔹 Identify external scripts loaded by the page?
🔹 Look for other hidden elements that might dynamically inject content?

----------------------------------------------------

https://scontent.fpnq3-1.fna.fbcdn.net/v/t45.1600-4/484493254_630816433438855_8599940131171116706_n.jpg?stp=cp0_dst-jpg_p526x296_q75_spS444_tt6&_nc_cat=1&ccb=1-7&_nc_sid=467c85&_nc_ohc=NWBdS9gkmXAQ7kNvgHWrfu6&_nc_oc=Adkg9W9lSTxbKXbAhtdiZawllUCdOJIq_niJxfSbl2clJYmVK4BQyy19CROHFDdW_-Q&_nc_zt=1&_nc_ht=scontent.fpnq3-1.fna&_nc_gid=eoV6-p-1yXgi9_CPcV7v2w&oh=00_AYHNHnrnEHe-JY44WdC6qLstBnqhgXoR8lSqdsQJ4p5tUQ&oe=67E81EEE

https://l.facebook.com/l.php?u=https%3A%2F%2Fwww.8x7kxgs18.top%2FBG%2F%3Ffbclid%3DIwZXh0bgNhZW0CMTAAAR2wsto-w7k5DHyI62S0i_9pygBGYADmdJKgRAjUebbIZMpB2dlTbmkERbQ_aem_wWyzchAXedXPpzB_H1fA8Q&h=AT36nd6EO9QxGtS2XKTmXXHdROctmY--uLFbVZI5mMwqVCOI7wRSZOIxTy8_SeT5Gs3mnVYuMl3NjzLP0gkmErkboBY7kl786LmaxghVQpd_ORie3QeO3_ONMowISXVDL7mR&__tn__=%2Cd-UC%2CP-R&c[0]=AT29oBYVldu8uvSaycxHzoVyBCrThoKhLbfSWvcPnks2mYWDvueINkQP_nexrLSMh2aZEVpEVWTJYJDLixsgc8EIGAvqq-3vff-Q8W8VYasQc1tOZA5IC0pYuAnFdc1wjxiGGtjH_qXgVVmodSMffa8iz0EZvLS1xI2C7TYZhzpF_M6GgqFFB_Vx4Ju6-NWeLbkhErFIEyzlouO9MVlg7-qTuAe1IofzyCgrtxfZSFriuoQJhN2_RDasnCwCcU3uZpHdBUYks2tcvPVSGf_srVRkiLXa59KCSdO6WC9KozPkAwdNSWRp787NgJZb24xaukbU2jf_zx6kcAtWcQQLE-KqVinUGzyYiYFQa3NulyQJBiJhDgpGNYY5