Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d1e01292b4a407…

MALICIOUS

PDF

29.9 KB Created: 2021-07-19 19:35:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 88f7932f6c335f585c8a7c6e2f0e1f1f SHA-1: 1f405187a90a0798ed6eb9bc32473ffdc10b9c49 SHA-256: b2d1e01292b4a40775ae9bbf61f73ee4dfb2eb027e235c23a782755c159c3379
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9449

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 http://netcdn.tw/app/479516143/free-minecraft-account-game-hack PDF link annotation
    • http://rzt.com.ua/images/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://rzt.com.ua/images/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://rzt.com.ua/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://rzt.com.ua/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://rzt.com.ua/images/free-robux-com_GM431946152.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
font_00_sfnt_off000024b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24B7 21720 bytes
SHA-256: 5988f221c9ac5f71d5d8fa1ceb1a225deddd0271b59857b57753e4ff050353b2
font_01_sfnt_off0000547b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x547B 17848 bytes
SHA-256: 6e6a79a2e8d921ce4110ee7bea64574f9639f41d67ba7d7747bc91dcd849eff6

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