Malicious PDF — malware analysis report

Static analysis result for SHA-256 8495d75873604a3e…

MALICIOUS

PDF

40.2 KB Created: 2021-04-28 11:35:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5e7ea80ecee3c4b57dcecdc0ff4aa410 SHA-1: 7d14371473c59d44c93539dea0cf694e2b023eee SHA-256: 8495d75873604a3e7fa3175a65754bfc0ab5b3e699b228efba72a7964f81e210
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document uses a social engineering lure, specifically a 'game hack' or 'generator' theme, to trick users into clicking malicious links. The document body contains text and embedded URLs that promote downloading hacks for games like Roblox, and the heuristics indicate it's a browser extension/update installation lure. This strongly suggests the intent is to deliver a payload, likely malware, through the linked content.

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/roblox-tower-battles-hack-download-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/free-robux-br-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-generator-hack-2021-no-survery.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-badge-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-lumber-tycoon-2-whitelist-hack-script.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-gear-items.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-robuxhack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hack-roblox-2021-youtube.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/unlimited-jump-hack-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-do-you-get-robux-5m-for-free.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-hacks-p.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_003_off0000413b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x413B 24824 bytes
SHA-256: e6fdb24b7a525e1a823169d465da2d42a0502628a9b149a6c6ddc29708799a25
font_01_sfnt_off00007971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7971 18792 bytes
SHA-256: 97ca8b826d4e3ced91fa833242583fd1a9df9763eff68894d47ceb2e9ba85974

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