Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90c0f0e09a8ce63…

MALICIOUS

PDF

39.9 KB Created: 2021-04-22 22:51:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c3e2709a869377898f9a61551621c4a5 SHA-1: 0c514ef3667894a3b6b1b59629b63dc03ce311a4 SHA-256: a90c0f0e09a8ce63be24e71d4663ab67c4009f95c7e4ffb86704f6624c82f33f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • 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.
  • 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://netsecure.pro/app/431946152/roblox-hack-download-pc-robux-game-hack PDF link annotation
    • http://www.barsa.it/images/free-robux-quote.pdfIn PDF document text
    • http://www.barsa.it/images/how-to-hack-in-roblox-games-to-get-gold.pdfIn PDF document text
    • http://www.barsa.it/images/how-to-hack-roblox-tycoons-2021.pdfIn PDF document text
    • http://www.barsa.it/images/farming-simulator-roblox-cheats.pdfIn PDF document text
    • http://www.barsa.it/images/free-roblox-items-com.pdfIn PDF document text
    • http://www.barsa.it/images/roblox-free-hats-codes.pdfIn PDF document text
    • http://www.barsa.it/images/how-to-hack-download-level-dragon-ball-final-stand-roblox.pdfIn PDF document text
    • http://www.barsa.it/images/roblox-games-free-online-for-kids.pdfIn PDF document text
    • http://www.barsa.it/images/how-to-get-free-unlimited-robux-and-obc-lifetime.pdfIn PDF document text
    • http://www.barsa.it/images/how-to-make-vip-server-for-free-in-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
stream_003_off00003e64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3E64 25020 bytes
SHA-256: 232769f971a2a3e4bd5a6d0b9b3d35435404a1c1137c8b3c098ab53e62d28c8f
font_01_sfnt_off000077e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E5 18980 bytes
SHA-256: acafc0bb0c8a36f9d9ef20b988b651574652d8331d5a8207c491d1a567cb02af

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