Malicious PDF — malware analysis report

Static analysis result for SHA-256 950c79b1f98fb692…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 20:33:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e95a9258ed745bb7ef7a26d766a90ce2 SHA-1: 833eb3f4de059dbcd760631d4a9fbc1f1fe02a38 SHA-256: 950c79b1f98fb692e362c019174812f56b2e1643bd65e13163ec60e085ca4f60
82 Risk Score

Malware Insights

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

The PDF contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body also contains this URL, reinforcing the lure. The ML classifier also flagged the PDF as malicious with high confidence.

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/479516143/toolbox-for-minecraft-pe-game-hack PDF link annotation
    • http://library.yamasi.ac.id/repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-noclip-in-roblox-cheat-engine-67_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/boku-no-roblox-remastered-cheat-codes_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-vilicus-roblox-tablet_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-shirts-free-girl_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/como-hackear-la-cuenta-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/they-hacked-my-roblox-account_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_off0000307f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307F 22756 bytes
SHA-256: 45e84b04faca58b992f832470d63d0d374c1924bac59d2ef3801ad8bb3ea49cf
font_01_sfnt_off000062a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A3 18592 bytes
SHA-256: f32c1ca8168d27304aec22942809e8223fb1c64027b7ede4107c71745ae71c26

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