Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fb143f0d2fa246…

MALICIOUS

PDF

36.2 KB Created: 2021-05-21 15:37:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dac4959fa9fc27cb04847324542b0f7a SHA-1: 6557dfaa124422c7037047ccac884ef962a5de20 SHA-256: 20fb143f0d2fa246167eb6162262f6c4af0ed7abb30e8075771b58bb2e310ac3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'Roblox Mobile Hack' and a call-to-action button, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate a redirection to a game hack generator. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-mobile-hack-game-hack PDF link annotation
    • http://korporacjaroma.pl/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/robux-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/roblox-install-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_off00002f49.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F49 26328 bytes
SHA-256: 118ae8ef118361d4056f9e49c6abada80d73f1b80fe356b36d0411910f5aca31
font_01_sfnt_off00006baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAF 18500 bytes
SHA-256: e5e44b7d88d65c0aa39187413bdce35fa7eb26b841b7c8af9c826d312b99eefc

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