Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04d2792026f3532…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 11:44:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b39043bd01dd5a6bd7dd7546c5725c93 SHA-1: c660e12199ce6b0fe27ccdcc34915c1e85592b82 SHA-256: d04d2792026f35323a36498399f0db54ed297908e769678ea21c849057629f54
182 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it's a lure for game hacks and fake CAPTCHAs, directing users to external URLs. The document body, though heavily obfuscated, contains references to game hacks and URLs. The presence of multiple external links suggests a link farm or redirection mechanism designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/free-girl-hair-roblox-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-party-de-roblox-pisode-14_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/daily-coin-master-free_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_off00005168.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5168 25464 bytes
SHA-256: d7641d473ecaaf237bee59c19f388bf711b9f1853a75459928a14a07ef38b5e2
font_01_sfnt_off00008c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C79 18296 bytes
SHA-256: 8b4c4b2b466665ac93a944d4fc06515a87c4aea34a1519436c139db9e2468eb4

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