Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ea473760932131…

MALICIOUS

PDF

45.0 KB Created: 2021-05-11 04:04:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 457ed87fd489bb8a3aeedd787e5a2b73 SHA-1: 65a76828231981067d2799be549f53524b4c8144 SHA-256: c2ea473760932131d7919ef3fc2d87dc6441094ed9f7228b7650daa6592eb6b6
122 Risk Score

Malware Insights

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

The PDF document contains a lure for a game hack, directing users to a suspicious URL. The presence of a fake CAPTCHA prompt suggests an attempt to trick users into performing an action, such as downloading a payload or providing information. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-hack-game-hack PDF link annotation
    • http://lib.stiesultanagung.ac.id/repository/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a7a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7A 23856 bytes
SHA-256: c3fd515bf12e9a57c347a08df21bac78973fa41292f9512c36b356cc11c5f97e
font_01_sfnt_off000080cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CF 3380 bytes
SHA-256: 1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57
font_02_sfnt_off00008cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB8 18476 bytes
SHA-256: c2f5b1848ff169b31c97a42ada7a437145dc26f40c6d7c3b53e9420ed4832cc1

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