Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5dea5a90d94c73…

MALICIOUS

PDF

40.9 KB Created: 2021-04-29 13:09:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 01bbf051d0f4457807a18abaa89be9b6 SHA-1: cee8bebc6c30afa8fc802c4653db5ad4dd262756 SHA-256: bb5dea5a90d94c739c9d4faf4f104714d6678fc051783e8cf3e9b4ad296add91
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'Roblox Hack 2021 Pc Download' and contains multiple links to external websites, one of which is identified as a redirector for game hacks. The document body also contains phrases like 'CLICK HERE TO ACCESS ROBLOX GENERATOR', indicating a social engineering attempt to drive users to malicious content. The ML classifier strongly flagged this PDF as malicious.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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-hack-2021-pc-download-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/natevang-free-roblox-hacks.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/cheats-for-murder-mystery-2-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-jailbreak-hack-download-mac.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-in-claim-gg.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-toy-codes-unused.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-spawn-models-in-roblox-with-hack.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hack-roblox-vehicle-simulator-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-sword-that-work-in-roblox-games.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-roblox-in-game.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-in-roblox-2021-may-19.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_off00004098.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4098 25328 bytes
SHA-256: b109b28c1b573d3c82db012b084e337c2399760b520c6f6c1dbbe2c19d3b5740
font_01_sfnt_off00007b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1C 19244 bytes
SHA-256: 1007919296e75a0fb63e7d683b2e5e7558df8630628a8cff58108d8fa9c7a41c

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