Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f102134043814d6…

MALICIOUS

PDF

39.3 KB Created: 2021-05-21 00:59:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f210b40dd8e921d514164b4928b7fbb5 SHA-1: d0aa835e8bff374d96a1a0fb244cfb8c1d7c761c SHA-256: 4f102134043814d6d505b2991c9e42231c812ade76735f1ef89ee74b52238363
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 0.9476

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/free-robux-glitch-2021-game-hack PDF link annotation
    • https://elearning.min2kotamalang.education/__statics/gudangsoal/files/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.min2kotamalang.education/__statics/gudangsoal/files/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • https://elearning.min2kotamalang.education/__statics/gudangsoal/files/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • https://elearning.min2kotamalang.education/__statics/gudangsoal/files/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • https://elearning.min2kotamalang.education/__statics/gudangsoal/files/www-roblox-com-robux-free_GM431946152.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_002_off00003455.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3455 29484 bytes
SHA-256: cb266cbf276dadbac267de97ec4dcb7de79b2827b2d630cfa44fbe5b74ec7920
font_01_sfnt_off000076c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C6 18880 bytes
SHA-256: e0b2f5218feb7ccbc61643c87456d5d0b0f9dddc4acedfb65bbbea4baf30e52d

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