Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db9a56365ea87f4…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 21:52:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 29171b3e1c64cf53d757de91eeaa9295 SHA-1: a9f9ad66714e5f5c634188d0394a0d693ba8ba4a SHA-256: 3db9a56365ea87f43d93f6ef1901a836e0d774c95aabb2d2a6173e1dca57e601
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.co/app/431946152/how-to-get-free-avartar-shings-on-roblox-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-dumb-smart-cheater_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/static-moonactive-net_GM406889139.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_off000031f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F5 22300 bytes
SHA-256: 4f461748d5d829ae613189889de29f2b8737fce78eee636915de2bdf0579d990
font_01_sfnt_off0000635c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635C 19316 bytes
SHA-256: 1a2757f8a3c97091028edf50a7242fd8fa75868f73bffb9ee6239b22d07b7e5a

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