Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e74162546443605…

MALICIOUS

PDF

41.8 KB Created: 2021-04-28 05:53:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b6b877a69864d7b45ecc4ad1bf480bdd SHA-1: 85456b634ef03c3830ad9f7137ce5e9f783407d1 SHA-256: 4e74162546443605010dc17fee6b2f254b032afbf1e32bca435b2fa064befe6f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free generators, directing users to a malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics suggest an attempt to redirect the user to a potentially harmful site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • 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.
  • 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/hacker-shirt-roblox-id-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/kidnap-cheat-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-no-verification-no-credit-card-no-surveys.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hacks-for-counter-blox-roblox-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-how-to-make-thumbnail-for-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-robux-on-roblox-for-free-on-phone.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-dragon-ball-rage-hack-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-sites-that-work-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-toy-codes-list-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-people-for-revenge-on-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-com-mobile-hacks-for-free.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_off0000418c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x418C 27996 bytes
SHA-256: 72efe1c0600c0bf704cda755a216e8818b6c55e3f1b78f504c433eaaa92d345f
font_01_sfnt_off00008025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8025 18748 bytes
SHA-256: 9d127cc4a412c7d63f799c6ee01e91b2adcb38610b7f71f6867a4d1158d73e8f

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