Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27b64792ca1203a…

MALICIOUS

PDF

35.5 KB Created: 2021-05-21 11:15:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fd4b0b73a3e550c82b5efffc08f8925e SHA-1: 25fef2e6300fdebaeeecb679b44eb94444e89795 SHA-256: e27b64792ca1203a55ca89316da3549ba2e757cd8959db6aebddd77ac3b5346f
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 0.9492

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/479516143/minecraft-server-hacks-game-hack PDF link annotation
    • http://www.oden.vn/upload/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://www.oden.vn/upload/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.oden.vn/upload/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.oden.vn/upload/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.oden.vn/upload/files/free-headless-head-roblox_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
stream_002_off00003328.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3328 24588 bytes
SHA-256: 7ed5ca20c36b05698ce266c28c3a7dadceff75a6cd7e8e64a8fa10d85736a52e
font_01_sfnt_off00006af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF2 17852 bytes
SHA-256: d08e9f99218473ecffc4f3e4fddc043c571e48cf04331ee5ff23a4dc6866f563

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