Malicious PDF — malware analysis report

Static analysis result for SHA-256 71970f4c2804ad95…

MALICIOUS

PDF

35.9 KB Created: 2021-07-08 07:05:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5572feb79b596ac0f83d4442838423bf SHA-1: 72f70a823e017275edf62f549ebb199f68e36f03 SHA-256: 71970f4c2804ad95bbb23dee09886c582d56d6ff1f6cdcbc43f153b5afda60c7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF documents related to game cheats and free currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm or redirection mechanism. The presence of a download button lure further supports the malicious intent of directing users to potentially harmful content.

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/free-coins-coin-master-blog-game-hack
    • http://digilib.stiki.ac.id/repository/how-to-get-promocodes-robux-free_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/see-through-walls-roblox-hack_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/how-to-get-free-premium-roblox_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/minecraft-creative-mode-free_GM479516143.pdf
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/coin-master-cheat-free_GM406889139.pdf
    • http://digilib.stiki.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • http://digilib.stiki.ac.id/repository/download-minecraft-free-hiapphere_GM479516143.pdf
    • http://digilib.stiki.ac.id/repository/money-for-roblox-strucid-free_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/how-to-hack-roblox-games-2021_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/coin-master-free-gold-cards_GM406889139.pdf
    • http://digilib.stiki.ac.id/repository/www-hack-roblox-online_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/roblox-roblox-hack-free-robux-generator_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/robux-hack-no-human-verify_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/roblox-hack-ga_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/game-pass-roblox-free_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/robux-generator-no-survey_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/give-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000365b.bin
760d0d5cc5a26e05279e0f6c96c5da7e9dd5aa3c8cb50098ea985a8ad37df8ea		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x365B 23020 bytes
font_01_sfnt_off00006a04.bin
4d8a9a5f845e6a4543ff8d893a9e279bb8bc764ff82ea70c3d9fb3020af74c46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A04 18288 bytes

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