Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1caf3d6aa1a8411…

MALICIOUS

PDF

33.4 KB Created: 2021-06-26 16:16:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0187ded6631bfe20ade2036b3605badf SHA-1: 517605d452652c3c52cad468d4c6c5879c0d02c7 SHA-256: c1caf3d6aa1a8411bdf423c0fe2db9db35f4becdf65e76919ed933aa1307c5ce
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs and a "download" call-to-action, strongly suggesting a lure for users to download potentially malicious files related to game hacks. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves directing users to external links that likely host malware or further phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/hack-para-juegos-de-guerra-roblox-game-hack
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-70-spin-link-today_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-hack-2021_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-hack-coin-master-ios-2021_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/download-minecraft-java-edition-free_GM479516143.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/free-roblox-valkyrie-giveaway_GM431946152.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-free-coins-in-roblox-pet-simulator_GM431946152.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/minecraft-hack-ios_GM479516143.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/minecraft-hacked-client-download_GM479516143.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-hack-without-verification_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-email-free-spins_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/roblox-pink-free-robux_GM431946152.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/hack-para-island-royale-roblox-2021_GM431946152.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/free-spins-coin-master-november-2021_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-hack-apk-android-1_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/hack-into-any-roblox-account_GM431946152.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-free-shirts-on-roblox_GM431946152.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/aimbot-exe-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b8c.bin
7c916fb6e50ee8978e5911d6343bacb03531ac44a02f1b1e30453573686cbf92
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B8C 22344 bytes
font_01_sfnt_off00005d1c.bin
c8ba38a16bd1b759b49899285b7ceddafc88d53eb7c557f880705ff9367133f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1C 19284 bytes