Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d708063da50315…

MALICIOUS

PDF

32.5 KB Created: 2021-07-01 06:00:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 18c34043aa1fbd45471eb4a4b4b97a5a SHA-1: 42d11e0ab1f702f0f8ef78442189e90c90b8c057 SHA-256: 65d708063da5031576d55a9e4a46a617863aef32b1efe019fa4862f497ca9732
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and sites offering game hacks and currency. The document body explicitly mentions 'Free Dominus Roblox' and 'CLICK HERE TO ACCESS ROBUX GENERATOR', reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 http://netcdn.co/app/431946152/free-dominus-roblox-game-hack In PDF document text
    • http://licko.cz/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/get-5-free-robux-just-for-signing-up_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/can-you-use-cheat-engine-in-2021-roblox_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/roblox-com-free-robux-games_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/roblox-speed-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/roblox-robux-hack-mega_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/hack-jailbreak-roblox-dinero-infinito_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
font_00_sfnt_off0000289a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x289A 22148 bytes
SHA-256: 00effcda2cd103ab5d482422bef1c5b6560088a904289a4bc9dad0b5d23c0b30
font_01_sfnt_off000059a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59A4 19340 bytes
SHA-256: 781bfc388907dc65260be8c95cc2de7d0d53b52d4e0ea4dde7ebc85e12530e77

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