Malicious PDF — malware analysis report

Static analysis result for SHA-256 76882e0247b50d0e…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 21:00:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5debb13fe2a482e533d6763ff728c2a3 SHA-1: fe312e93b7b8f99b0bcaa095425e69a18c13c7dd SHA-256: 76882e0247b50d0e4284d18c8d33ba1feffb4c59b0c01007f8b8ce8fbc1368f0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure for game hacks, specifically targeting Coin Master and Roblox. The primary URL, http://netcdn.tw/app/406889139/coin-master-rewards-app-game-hack, is identified as a high-risk redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a site that likely hosts malware or phishing content. The ML classifier strongly flagged this PDF as malicious.

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/coin-master-rewards-app-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-god-mode-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-treasure-hunt-app_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/money-and-ranking-hack-roblox-link_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/project-alpha-20-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-no-survey-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-a-free-bag-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/best-minecraft-hacked-client_GM479516143.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
stream_002_off0000346b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x346B 23296 bytes
SHA-256: 8ed1e8b1da5fdd9696016fa06534558392d56cd2ee5c43fc110fceb7f37aee9f
font_01_sfnt_off0000690f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690F 18348 bytes
SHA-256: 45424ac4f3ff45d139caa860f388b1f701ed118c37a64d99de4ada9b4bfd65a4

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