Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa9d748ec6c5634…

MALICIOUS

PDF

35.7 KB Created: 2021-07-06 12:42:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e43e22cf398a1a199ce6bb6a4018db78 SHA-1: 9013ae76c5ab8ca242a2b9bd0c11f855d0c28254 SHA-256: faa9d748ec6c56344025bb87d1163bfdb35735922a6193452cb131975ade0d66
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that are designed to lure users into clicking on them by promising free in-game currency or hacks. The primary URL, http://netcdn.tw/app/406889139/free-coins-for-flip-master-game-hack, is flagged as a game hack redirector. While no scripts were explicitly extracted, the nature of the lures and the high ML classification suggest the PDF is intended to lead users to malicious sites for further exploitation, likely involving credential harvesting or malware delivery.

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/406889139/free-coins-for-flip-master-game-hack PDF link annotation
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/roblox-work-at-a-pizza-place-hack_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-hack-me-robux_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_off000033f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F2 23528 bytes
SHA-256: e0517cd7c602efa2d9e512c6bc90777fbcf0202e3d98e4355586cf8c33bc4b14
font_01_sfnt_off00006944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6944 18248 bytes
SHA-256: 15af221dd5c3311a73758cd56b9e13e8fd3ef2e59b1801455b5f1f458413cd9b

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