Malicious PDF — malware analysis report

Static analysis result for SHA-256 e77595394ae81079…

MALICIOUS

PDF

34.3 KB Created: 2021-06-18 04:15:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 291540ffb8af339d74897651c848ace1 SHA-1: 75f40b3888694290e111aed678773db944365105 SHA-256: e77595394ae81079303ed0f117043bfd03de8b63c0abe81dfda5dfa6fb81be27
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, many of which are structured as SEO-optimized slugs pointing to game-related cheats and hacks. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate malicious intent. The document likely serves as a lure to direct users to external sites that may host malware or facilitate further compromise.

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-make-custom-api-for-roblox-hack-game-hack
    • http://lib.fekon.untad.ac.id/repository/free-coin-coin-master_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/can-you-get-minecraft-for-free-on-pc_GM479516143.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-codes_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/scary-larry-roblox_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-roblox_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-game-free-spin_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/free-coin-and-spin-link_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-today-39_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-extension_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/2021-free-spins-coin-master-link_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spin-now_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/tiktok-free-online-books_GM835599320.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-make-my-own-hack-for-roblox_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/roblox-hack-download-pc_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-ios-without-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f15.bin
54a8b42b67fbe25e25d75cc0a2d182dfa9f0ad4071b5c3e9ca00e64d813bfd8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F15 21660 bytes
font_01_sfnt_off00005e93.bin
6431ade9da392be80e9c8d1abe5f76ee62f39382db5bd3609e6bda27d4fdb130		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E93 19980 bytes

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