Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d3b0eada269880…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 21:18:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 64ba55a464f39bfad6141226068ce37e SHA-1: b23d4af02d22ad026e36b0691fa15f1aa6e72528 SHA-256: d2d3b0eada26988044d1a8431837d1a425469e708e3c4eb6029d645480bb4dbc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are structured as SEO-friendly links to other PDFs. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests a tactic to distribute potentially harmful content or engage in SEO manipulation. No scripts were extracted, but the document body and heuristics point to a lure for game-related cheats or hacks, likely leading to further malicious downloads or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://netcdn.tw/app/406889139/how-to-get-free-snacks-on-coin-master-game-hack
    • http://licko.cz/files/how-do-i-get-minecraft-for-free_GM479516143.pdf
    • http://licko.cz/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdf
    • http://licko.cz/files/how-to-hack-through-roblox-walls-in-the-streets_GM431946152.pdf
    • http://licko.cz/files/free-robux-202100_GM431946152.pdf
    • http://licko.cz/files/roblox-cheats-how-to-get-free-gear_GM431946152.pdf
    • http://licko.cz/files/descargar-coin-master-hack_GM406889139.pdf
    • http://licko.cz/files/roblox-robux-hack_GM431946152.pdf
    • http://licko.cz/files/how-to-get-free-robux-on-roblox-2021-fast_GM431946152.pdf
    • http://licko.cz/files/how-to-get-free-robux-gift-card-codes_GM431946152.pdf
    • http://licko.cz/files/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://licko.cz/files/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdf
    • http://licko.cz/files/give-free-account-roblox-13-jun-2021_GM431946152.pdf
    • http://licko.cz/files/roblox-how-to-customize-your-character-for-free_GM431946152.pdf
    • http://licko.cz/files/xeno-hack-roblox_GM431946152.pdf
    • http://licko.cz/files/how-to-get-free-robux-no-hacks-glitches-or-troll_GM431946152.pdf
    • http://licko.cz/files/roblox-hack-game_GM431946152.pdf
    • http://licko.cz/files/vip-roblox-free_GM431946152.pdf
    • http://licko.cz/files/roblox-dumb-smart-cheater_GM431946152.pdf
    • http://licko.cz/files/roblox-how-to-get-tge-free-trial-trial-bc_GM431946152.pdf
    • http://licko.cz/files/free-robux-gift-card-codes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fd9.bin
dfb8082ed67b7872101bba92d86f9711a39962215f0a2a52752035bb2354a943		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD9 23212 bytes
font_01_sfnt_off0000642f.bin
b6182daa68ff06b6167a35a103e01f243afa869e4713b8423aeb12bc49028461		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642F 18332 bytes

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