Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0762c2bc999bde6…

MALICIOUS

PDF

33.2 KB Created: 2021-07-09 01:15:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 88ea82bbfd898b61e29809212bf043b5 SHA-1: 1d37d3b523ad111f092db47a35947f738d69d32e SHA-256: f0762c2bc999bde671d69e68efcb5f44f65987501c743d765f7f1da8e3a09858
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 0.9980

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/431946152/how-to-get-free-robux-for-real-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/best-hack-guis-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-pro-tv_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-realms-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-on-murder-mystery-2-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-in-2-seconds_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/test-all-free-roblox-gear-free-admin-ban-scripts_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-from-google_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/cheats-for-ninja-legends-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-roblox-2021-august_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-shower-simulator-cheats_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-for-kids_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_off00002d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D9E 21436 bytes
SHA-256: 280556666cf5579f52c54f676247920ed27938d5a04beea2a0cee139a63f4357
font_01_sfnt_off00005c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6E 19056 bytes
SHA-256: f4ef8dd6bf40d1c11b2a1b1182ebe3cc130548f6133d652513fc66e114cd9f45

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