Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9097d2763b5e67…

MALICIOUS

PDF

43.7 KB Created: 2021-06-04 04:09:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b193596c5f7427f16abd9f273e8ec6a5 SHA-1: cb037b789d8b6f4737451549751a17b609ff4971 SHA-256: 3c9097d2763b5e67f90289338203681816e7e58ed1fad72e994a9c62651fa62f
122 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'game hack' and displays a fake CAPTCHA, aiming to trick users into clicking malicious links. The primary link directs to a suspicious URL, likely serving as a gateway to a malicious website or further payload delivery. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

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/hackear-coin-master-2021-game-hack PDF link annotation
    • http://library.acehresearch.org/repository/coin-master-village-3_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F1B 25312 bytes
SHA-256: 84af716a67ffef21a8c8f841f83342e6930c7928995e84d9f28770a930f762de
font_01_sfnt_off0000886b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x886B 18116 bytes
SHA-256: 835205c12f27628b43a9501073f928ecba08a070d1a79211f3098410d295e285

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