Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c74c961dc2b39b…

MALICIOUS

PDF

31.8 KB Created: 2021-07-19 11:15:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3cfe6a77543fa424e87ffaa36c094fb2 SHA-1: d6807b47238ca573e0a0cea580bd0ed8e5e0b732 SHA-256: f4c74c961dc2b39b5a70334ea49dbac1cbc1079a82da55a44731a41e67631d82
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 0.9445

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-mods-for-minecraft-pe-game-hack PDF link annotation
    • http://www.alsultantrading.ae/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-robux-cards_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_off00002785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2785 23016 bytes
SHA-256: f118b8b102b9b3feebddff2539172e1b10de1d76af00424b1edba836b08dcdeb
font_01_sfnt_off00005b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B40 18040 bytes
SHA-256: 55677d50e7f19372d6dfb723d72c398dee248f925afb4425ab44c3bb4ecd28f4

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