Malicious PDF — malware analysis report

Static analysis result for SHA-256 463a450c4e10e9a7…

MALICIOUS

PDF

34.6 KB Created: 2021-06-22 22:38:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 06ad0043dd3e0184c722b8aa9a5d3417 SHA-1: f79328fc4d8c04b7f354cdde558a766c0a3259c7 SHA-256: 463a450c4e10e9a72c59e70b89d22825a2037ae8c4c8fe7eef0fa605838cfbd4
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to websites offering game hacks and cheats, such as 'free-roblox-gfx-game-hack'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users searching for such content. The ML classifier also flagged this PDF as malicious with high confidence.

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.co/app/431946152/free-roblox-gfx-game-hack
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-version-2021-free-download_GM406889139.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/como-descargarse-hacks-en-roblox-jailbreak-agosto-2021_GM431946152.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/coin-master-online-hack-no-human-verification_GM406889139.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/how-to-install-minecraft-for-free_GM479516143.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/how-much-pubg-uc-cost_GM1330123889.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/hacked-client-for-minecraft-bedrock_GM479516143.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/50-free-spins-coin-master_GM406889139.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/robux-2021_GM431946152.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/free-robux-codes-not-used_GM431946152.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/minecraft-windows-10-edition-free-download_GM479516143.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/who-to-get-free-robux_GM431946152.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/pokemon-go-free-daily-spawn_GM1094591345.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/free-coin-master-spin-app_GM406889139.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/free-spins-on-coin-master-2021-ios_GM406889139.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-generator-tool_GM406889139.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/windows-10-minecraft-free-with-java_GM479516143.pdf
    • https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000314a.bin
2c5a780d5431d73252efe5c59a2d7159e960239d502491873ca0cd10a416adca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x314A 22508 bytes
font_01_sfnt_off00006383.bin
4b5b8965bd01f2ff192a7b731f5b4e5ce4ce040ff1abef054b138aebdbdf2b50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6383 18652 bytes

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