Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3eac4d0c2e2299…

MALICIOUS

PDF

34.5 KB Created: 2021-06-20 21:12:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4d615cc1014e3540c053c62d00bdab09 SHA-1: 1d953803908dd7e458e7642fcfc9d58676d94b7a SHA-256: ee3eac4d0c2e2299af612a27dcde567884828faac4a59f54dd3261edf0f2fefd
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, including a primary link to 'netcdn.co' which is associated with a 'free Robux' scam. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO abuse tactic. The presence of a 'download button' lure further supports a malicious intent to redirect users to potentially harmful websites.

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/how-to-get-free-robux-no-scam-game-hack
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/como-hack-coin-master_GM406889139.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/is-tiktok-free_GM835599320.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/coin-master-gold-cards-hack-2021_GM406889139.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/easy-basic-hacking-engine-for-roblox_GM431946152.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/robux-free-online_GM431946152.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/free-online-games-no-download-like-roblox_GM431946152.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/robux-generator-no-verification-needed_GM431946152.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/free-robux-games-that-actually-work_GM431946152.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/flip-master-coins-hack_GM406889139.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/gameoffice-net-hack-coin-master_GM406889139.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/free-robux-that-actually-works_GM431946152.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/free-robux-com-real_GM431946152.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-daily_GM406889139.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/free-roblox-groups-with-funds_GM431946152.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/free-roblox-items-codes_GM431946152.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/free-robux-no-gift-card_GM431946152.pdf
    • https://www.lakenheath.suffolk.sch.uk/admin/ckfinder/userfiles/files/free-robux-mod_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f91.bin
ecf0992ada9b902c0f27a5479d74c7441c729e5db8bdc23f4c7edf67e0b38a61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F91 22320 bytes
font_01_sfnt_off00006159.bin
72e91211a3affe247d9388c26a58db3f395dad290ce4c146b29def1d5505ffab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6159 19244 bytes

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