Malicious PDF — malware analysis report

Static analysis result for SHA-256 379497a66a79bba2…

MALICIOUS

PDF

41.0 KB Created: 2021-04-28 15:28:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a9e79a200742c88a127c0c7ca5638e93 SHA-1: afeefd3855aa3c86f706c0e9ffd4a904259f1097 SHA-256: 379497a66a79bba21d2467f577390ac5eb4d27b350e1b917f00d503f509187eb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a 'GAME_HACK_REDIRECT_LURE' pointing to a URL associated with 'free robux'. The document body, though partially corrupted, also contains references to this lure and embedded URLs. While no scripts were explicitly extracted, the nature of the lure suggests it is designed to redirect users to potentially malicious websites for scams or further payload delivery.

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://netcdn.xyz/app/431946152/how-to-get-free-robux-on-roblox-on-computer-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/free-robux-promo-cides.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/robux-hack-no-survey-no-human-verification-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-upgrade-free-download.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/what-does-ce-stand-for-the-hack-for-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-free-boombox-script.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-magma-fiend-in-roblox-for-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-free-obc-generator.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-roblox-stat-changes-discord.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-a-private-server-in-roblox-for-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/comment-hacker-roblox-accesoir-2021.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_003_off000042b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42B9 25388 bytes
SHA-256: cc66913eeefe3891f384bc817341dc5636417715cbf3ade47325568ce5a249e3
font_01_sfnt_off00007cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD7 18792 bytes
SHA-256: a3d5230286ed1fa26ca2c9d28899978ffb2c011136c08394504054c777d6e672

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