Malicious PDF — malware analysis report

Static analysis result for SHA-256 49411d61d5e19d1f…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 13:16:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5197f83152907434a4c3804b37810c9c SHA-1: a7abc2fba5de0fdd401e4aac7cef721867ff9ba2 SHA-256: 49411d61d5e19d1fcb90db1574ae028b10b393dfda523b446ef2a36222442992
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are presented as hacks or cheats for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm or SEO poisoning tactic. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download button' lure further supports the malicious intent.

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.tw/app/406889139/coin-master-hack-pc-cheat-engine-game-hack
    • http://lib.fekon.untad.ac.id/repository/roblox-gift-card-hack-2021_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/free-spin-and-coin-links_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-really-get-free-robux-no-scam_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/hackear-prison-life-roblox-2021-pc_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/bad-business-cheat-roblox-tuto_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-hack-generator-club-no-verification_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/op-rewards-robux_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-blogspot-free-spins_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/lemonade-hack-roblox-jailbreak_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-fun-hack_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/cheat-script-beyond-roblox_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/roblox-walk-through-walls-hack-no-cheat-engine_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/free-minecraft-accounts-2021_GM479516143.pdf
    • http://lib.fekon.untad.ac.id/repository/que-es-free-build-en-roblox_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/roblox-download-pc-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003019.bin
24099ae32be2d3aa1218a68dcf320b579616241086e53bda968f3d80d7dd1a4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3019 22408 bytes
font_01_sfnt_off00006215.bin
6d12a5e0eb98766e75a11546a2696c78e8e61564fc37edf79f652a555e1dad85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6215 18324 bytes

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