Malicious PDF — malware analysis report

Static analysis result for SHA-256 3032d8429fe67e8a…

MALICIOUS

PDF

42.2 KB Created: 2021-05-12 22:22:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9dd548f891f1558f1424271aeffbb44d SHA-1: 574554dfa5c3bf219308663743b531d082e0d71e SHA-256: 3032d8429fe67e8a2c0c9b8508befe2ef4995aceb4e9c8ef6129c1f7a3e89533
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 0.9971

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/431946152/2021-roblox-game-hack PDF link annotation
    • http://kumotor.com.tw/upload/userfiles/files/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/robux-in_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.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_off000049dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49DC 24756 bytes
SHA-256: 81c68c2fecd2f55bec155d51e65350701a824adbdba74eb5e8b7cfddc33ed5f2
font_01_sfnt_off000082d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D4 18184 bytes
SHA-256: 056fc97d28377ebe533b38410a286871364a28d37687da14045fa683fef2556f

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