Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf2a0bdc3681635b…

MALICIOUS

PDF

38.3 KB Created: 2021-06-18 02:49:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 36ee456fac07c0e26af29b4b392ec982 SHA-1: 156c195a04720a9beb8370bbcfa0d5d2aa025db6 SHA-256: bf2a0bdc3681635bdceaee7448f683addef94241876a360bdecec6f963dd2e64
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9985

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-your-a-dominas-for-free-on-roblox-game-hack PDF link annotation
    • http://library.ulb.ac.id//repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robux-claimer_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/block-best-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/real-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/make-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-chromebook-exclusive-roblox-item_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/doge-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/earn-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/infinity-jump-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/but-link-says-free-robux-walter_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-game-hack-app_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_off00003dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DCF 22280 bytes
SHA-256: 29875d5aecc1a1e8ad56e439d389799ae6ad6392b392cc2b1ede563f7a44f1cf
font_01_sfnt_off00006f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4D 19584 bytes
SHA-256: c1cbe67aa7188bbf4a06ddeb4e8daa5c0522302e20263096477669bc1ce83458

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