Malicious PDF — malware analysis report

Static analysis result for SHA-256 400264319c3d85d4…

MALICIOUS

PDF

34.6 KB Created: 2021-07-01 18:20:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4c21dbab5b8c0d0e573542f1aa29d034 SHA-1: f2860e7e7e1323bf80ff8ae486d38e3363974c86 SHA-256: 400264319c3d85d43a06fd44a4be49bb3feea0b40713bf2d647d9deae6a23c96
142 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious SEO link farm, embedding numerous external links that lead to game-related content and potential cheats. The presence of a download button lure and instructions for password-protected archives suggests an attempt to trick users into downloading further malicious payloads. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/poki-with-free-roblox-game-hack
    • https://library.stikeswnpalu.ac.id/repository/how-to-check-if-your-roblox-account-is-hacked_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-golden-card-in-coin-master_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/download-apps-for-robux_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/coin-master-20-free-spins-link-today_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-cards-on-coin-master_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/can-i-download-minecraft-for-free_GM479516143.pdf
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-robux-without-password_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/boku-no-roblox-hack_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/rbxoffers-com-free-robux_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-robux-no-verify_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/robux-free-online_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-robux-roblox-forums_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-coin-master-ios_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/hack-scripts-for-roblox-download_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-followers-generator-2021_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/how-do-i-get-minecraft-for-free_GM479516143.pdf
    • https://library.stikeswnpalu.ac.id/repository/roblox-hack-robux-games_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f17.bin
f4a7a18e45e7daf5a1535e949364e2d4a73f246c03c9782dfa2ba16f142cf640		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F17 22440 bytes
font_01_sfnt_off00006104.bin
967321398f4d7bb813407851e6b265d0ccf3b1466c67414386fbc37a6f0b762a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6104 19564 bytes

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