6.pdf

6.pdf

🎙 John Hammond 👥 2.2M 📅 September 11, 2025 ⏱ 35 min 👁 971K 📄 tutorial 🧭 2026-08-16
Available in: English (current) Français

Keywords

malwarephishingSMBMSIJavaScript

Summary

In this video, John Hammond analyzes a malicious PDF file (‘6.pdf’) that was distributed via a phishing campaign. The attack chain begins with a fake AnyDesk download page that uses a Cloudflare-style verification to trick users into opening a Windows Explorer search. This search leverages the ‘search-ms’ protocol to connect to a remote SMB share, where a malicious LNK file is presented as a PDF. The LNK file executes a batch script that downloads a second-stage payload from a dynamic subdomain, which is actually an MSI installer. Hammond extracts the MSI using tools like 7z and MSI info, revealing a custom action DLL and a wrapped setup program containing a JavaScript file and a large executable. He explains the obfuscation techniques, including base64 encoding and XOR encryption, and demonstrates how to deobfuscate the JavaScript code. The video also highlights the use of living-off-the-land binaries and the importance of analyzing malware in a safe environment. The analysis is thorough and educational, providing viewers with practical skills for malware analysis.

168 words

Critical Evaluation

Value of the Information & Strength of the Argument

The video provides high-value information by dissecting a real-world malware campaign, showcasing the entire attack chain from initial lure to payload execution. The argumentation is solid, as each step is explained with clear reasoning and demonstrated through hands-on analysis. Hammond’s explanations are logical and methodical, making complex concepts accessible without oversimplifying. The value is enhanced by practical tips, such as using Linux for safe analysis and leveraging tools like curl, 7z, and MSI info. The video also encourages viewers to explore further, fostering a learning mindset.

Scientific Rigor, Source Quality, Title Accuracy

The scientific rigor is high, as the analysis is based on direct observation and reverse engineering of the malware. Hammond references the Huntress blog for context, and the video description includes links to relevant resources. The title ‘6.pdf’ is appropriate, as it directly names the analyzed file. The content matches the title, providing a detailed teardown of the malicious PDF. The video does not rely on unverified claims, and the methodology is transparent, allowing viewers to reproduce the analysis. The inclusion of a sponsor segment is clearly marked and does not detract from the scientific content.

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Title / Content Match

The title '6.pdf' is concise and intriguing, directly referencing the malicious file analyzed, which accurately reflects the content.

Quality & Reliability

9/10

The video provides a detailed, step-by-step analysis of a real malware campaign, demonstrating practical techniques for deobfuscation and reverse engineering. The author is a recognized cybersecurity educator, and the analysis is transparent and reproducible.

Key Moments

Cited Sources

Concurring Sources

Contribution & Novelties

This video provides a unique, hands-on teardown of a real-world malware campaign, demonstrating the entire attack chain from a fake download page to the final payload. It offers practical insights into deobfuscation techniques, the use of living-off-the-land binaries, and the importance of analyzing malware in a controlled environment. The analysis is detailed and reproducible, making it a valuable educational resource for cybersecurity enthusiasts and professionals.

Pour aller plus loin :

  • search-ms protocol — Official documentation on the search-ms protocol used in the attack.
  • MSI file format — Overview of MSI files and their structure.
  • Living off the Land Binaries — A comprehensive list of binaries that can be used for malicious purposes.

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Radar Profile

The radar profile shows high scores in information quantity, quality, and technical level, indicating a comprehensive and well-executed analysis. The slightly lower score in global reliability reflects the inherent limitations of analyzing a live malware campaign, but the methodology is sound.

Reliability 9/10

💬 The comments are overwhelmingly positive, with viewers expressing appreciation for the detailed analysis and educational value. Many admit to not understanding everything but still enjoyed the video, indicating a broad appeal. Some comments highlight specific technical points, showing engagement from a knowledgeable audience. Overall, the sentiment is very positive, with a few humorous remarks about the complexity.