Malicious PDF — malware analysis report

Static analysis result for SHA-256 204c305e26f68e71…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 23:00:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2e469b7d5f949f37b282895a951a19af SHA-1: 0965c581e8116181c41707a88636499f22b998c9 SHA-256: 204c305e26f68e71b7d4c1ded30f5efe7a2edaa0d2a66557e3ad8974a67a855e
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for game hacks, specifically mentioning 'Coin Master Free Spin And Coins Links', and directs users to a suspicious URL. The presence of a fake CAPTCHA heuristic suggests an attempt to trick the user into executing further actions, likely involving a downloaded payload or navigating to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a malicious intent to exploit user interest in game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-free-spin-and-coins-links-game-hack PDF link annotation
    • http://library.umla.ac.id//repository/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-viking-quest-hack_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
stream_004_off0000510d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x510D 24448 bytes
SHA-256: 18e4d88ccf9bc0e494a5c42e9ea70d392111f8ac7fbef3eaac064f0717f1697a
font_01_sfnt_off0000893e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893E 18228 bytes
SHA-256: ab1c4cdc214a6baf81a15e2f62a40ea9cfbbbf407f0f3dd1c7564e467cf0dae2

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