Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f77db8defc2bc00…

MALICIOUS

PDF

42.0 KB Created: 2021-04-30 16:44:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6cc057765be6828b8b7d33d937ed4607 SHA-1: 2a004ada55da922b598604b19e5415ab6029d227 SHA-256: 8f77db8defc2bc007d7f791965d352e79a661a6ed6e495764c8bac27acb7f22e
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://netcdn.xyz/app/431946152/roblox-free-stuff-2021-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-step-by-step.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-noclip-cheat-engine-64.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/youtube-roblox-hack-by-rox-exploits.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-jailbreak-hacks-for-money.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-base-terrain-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/flamingo-skin-but-its-free-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/breaking-point-roblox-hack-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/give-me-free-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-roblox-accounts-and-get-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/cheats-for-roblox-pokemon-brick-bronze.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_off000041f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41F1 28232 bytes
SHA-256: 820fd3345739300a3c37f286b248d49b4792fc3474af119330f312ca02e90907
font_01_sfnt_off0000818c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818C 18596 bytes
SHA-256: 08b5a2eda279705049cf30368ed3f8883984675f0a148fadb35d2549226b83b6

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