Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2706d2024bb64d…

MALICIOUS

PDF

38.1 KB Created: 2021-05-20 21:11:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ec68a8792c803e7ee876f8d85b5c57d3 SHA-1: 71a66003e177f78f859bf36e9a4b36f2f55c5c9d SHA-256: 6e2706d2024bb64db10fbd7ec2e0756fea907fc92a843da6681a549975b89389
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document displays a fake CAPTCHA to trick users into clicking a link, which is a common social engineering tactic. The embedded URLs and document body content suggest a lure for free Robux, likely leading to a malicious download or further compromise. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/how-to-get-free-robux-youtube-game-hack
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/roblox-studio-free_GM431946152.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/does-roblox-premium-expire_GM431946152.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/coin-master-free-pet-food-links_GM406889139.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003788.bin
c6dc49cecfb55c9239e3d469474e81178c8bf5789658c11fbe848ed39de090e8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3788 26120 bytes
font_01_sfnt_off00007346.bin
c8869677d4d84c4518e8410e1128de6ae04a76f8db213e07b668dd1668cda2fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7346 18444 bytes

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