Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb397185da8aa34a…

MALICIOUS

PDF

41.3 KB Created: 2021-04-24 14:13:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d8ec0f5f79345e1653f6ce43fd36a9d5 SHA-1: d33298c78877f7fa011c8922c9e6fd3f295648ab SHA-256: eb397185da8aa34aabce9fcee14c34cecab1c6567e54c15d338cefbeb543e428
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and heuristics indicate it is a lure for a 'free generator / game hack'. The primary URL, https://netcdn.xyz/app/431946152/robux-hack-ultimate-pro-game-hack, is presented as a 'Robux Hack Ultimate Pro'. The document body, though heavily obfuscated, contains references to this URL and the wkhtmltopdf application, suggesting it was generated from web content. The presence of numerous related URLs further supports the malicious intent of directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/robux-hack-ultimate-pro-game-hack PDF link annotation
    • http://wattkit.com/images/how-to-get-free-schrt-in-robux-brighschows.pdfIn PDF document text
    • http://wattkit.com/images/ropa-roblox-free.pdfIn PDF document text
    • http://wattkit.com/images/roblox-bucks-for-free.pdfIn PDF document text
    • http://wattkit.com/images/how-to-get-gamepasses-for-free-roblox-hack.pdfIn PDF document text
    • http://wattkit.com/images/roblox-hack-pc.pdfIn PDF document text
    • http://wattkit.com/images/roblox-hack-2021-free-robux-generator-working-method-scratch.pdfIn PDF document text
    • http://wattkit.com/images/free-robux-codes-get-robux-absolutely-free.pdfIn PDF document text
    • http://wattkit.com/images/how-to-hack-in-roblox-lumber-tycoon-2.pdfIn PDF document text
    • http://wattkit.com/images/minecraft-free-download-no-virus-and-free-robux.pdfIn PDF document text
    • http://wattkit.com/images/roblox-apocalypse-rising-hack-2021.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004278.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4278 25984 bytes
SHA-256: 635ce65886a57dee0fd33e7ec999562e8db589492e068248f42523c0a0d3f566
font_01_sfnt_off00007d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6A 19148 bytes
SHA-256: 25342e06de3f0bc1b4904218a6c71d96b91c60340f29a54e49b1fa6f72308c29

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