Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c5281b6c45a76f…

MALICIOUS

PDF

35.7 KB Created: 2021-05-21 20:54:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d9d4d98318d6b915dac3ea29cdbd277a SHA-1: 43904b885492117f77dccf597c97fbed500849d5 SHA-256: 61c5281b6c45a76f03412636566b404b271df4a8b622061ddbcb73677fd71efd
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 0.9648

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/406889139/coin-master-free-spins-today-daily-links-game-hack PDF link annotation
    • http://greasley.website/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/free-robux_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/free-minecraft-account-and-password-2021_GM479516143.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_off000032a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32A4 23936 bytes
SHA-256: faf190e205e541c5e6e71720359ed8cbe937d676e8edde9883a4dd67f1a3169e
font_01_sfnt_off0000691f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x691F 18652 bytes
SHA-256: 52d597ff4b9023df6b3510b92f87dc1d2329aed0448bc9fa59130058567cb992

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