Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46bfe0cf158b28e…

MALICIOUS

PDF

39.1 KB Created: 2021-04-27 03:45:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: affb72cffcc001ec78979f51d6e65d1a SHA-1: 9567974f08171bfb0ef94d4cf876682ed0a02a03 SHA-256: a46bfe0cf158b28edba8ed49831f11e81566491bc31fc1e24bde3bd8fb6d9da9
122 Risk Score

Malware Insights

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

The PDF contains multiple links and a call-to-action lure related to 'free game hacks' and 'generators', strongly indicating a social engineering attempt. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the user is prompted to install something, likely a malicious browser extension or update, to access the promised content. The primary IOC is the redirector URL which likely serves the next stage of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/431946152/script-for-have-gamepass-free-roblox-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/free-robux-scamgames-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-cam-script-roblox-v3rmillion.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-accounts-with-robux-2021-july.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-youtube-channel.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-do-you-get-hacks-on-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-your-old-account-back-on-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/dragon-ball-final-stand-roblox-hack-2021-may.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/earn-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-codes-that-havent-been-used.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/code-cheater-unboxing-simulator-roblox.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_off00003e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E85 23988 bytes
SHA-256: 38af43fb52b00750c07df261ebe8d0b55094a2ae5fdbf39614edd34271716a2f
font_01_sfnt_off00007508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7508 18948 bytes
SHA-256: 9190a2ee269de44cce594b2ea8589a928d776cebf17e7cc2459a1b98e9e26e40

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