Malicious PDF — malware analysis report

Static analysis result for SHA-256 da991b9892367a70…

MALICIOUS

PDF

36.1 KB Created: 2021-07-02 03:25:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4c14f7c1b18a707c6793c8d9aaab5d68 SHA-1: d8b79a2dd91d0ac6435692c8f4684352e2b91883 SHA-256: da991b9892367a70aaabfa977aafe644110ebfe8ab566cc778f62c3275792c4d
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which are related to game hacks and exploits for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm designed to attract users with deceptive content. The presence of a 'Visual download / call-to-action button lure' heuristic further supports the idea that the document is intended to trick users into clicking these links, likely leading to malware downloads or phishing sites.

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/types-of-free-hair-on-roblox-not-model-for-girl-game-hack
    • http://digilib.iailm.ac.id/repository/download-coin-master-apk-hacked_GM406889139.pdf
    • http://digilib.iailm.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdf
    • http://digilib.iailm.ac.id/repository/roblox-com-hack_GM431946152.pdf
    • http://digilib.iailm.ac.id//repository/coin-master-hack-generator-tool_GM406889139.pdf
    • http://digilib.iailm.ac.id/repository/youtube-roblox-avatar-free_GM431946152.pdf
    • http://digilib.iailm.ac.id/repository/how-to-hack-roblox-to-get-expensive-stuff_GM431946152.pdf
    • http://digilib.iailm.ac.id//repository/free-spins-coin-master-legit_GM406889139.pdf
    • http://digilib.iailm.ac.id/repository/rocashcom-earn-free-robux-by-watching-videos-and-completing-surveys_GM431946152.pdf
    • http://digilib.iailm.ac.id/repository/best-roblox-exploits-free-v3rmillion-november-2021_GM431946152.pdf
    • http://digilib.iailm.ac.id/repository/how-to-hack-kohls-admin-on-roblox_GM431946152.pdf
    • http://digilib.iailm.ac.id//repository/roblox-script-executor-free_GM431946152.pdf
    • http://digilib.iailm.ac.id/repository/redeem-roblox-card-free_GM431946152.pdf
    • http://digilib.iailm.ac.id//repository/free-robux-no-verification_GM431946152.pdf
    • http://digilib.iailm.ac.id/repository/roblox-hack-using-cheat-engine_GM431946152.pdf
    • http://digilib.iailm.ac.id/repository/hacks-roblox-how-to-get-banned_GM431946152.pdf
    • http://digilib.iailm.ac.id/repository/free-roblox-account-giveaway-2021_GM431946152.pdf
    • http://digilib.iailm.ac.id//repository/minecraft-free-ios-2021_GM479516143.pdf
    • http://digilib.iailm.ac.id/repository/roblox-infinite-health-hack-gary-s-hood_GM431946152.pdf
    • http://digilib.iailm.ac.id/repository/roblox-making-hacker-smilator_GM431946152.pdf
    • http://digilib.iailm.ac.id//repository/how-can-i-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032e3.bin
c95f6c6a8e690d623420869a1b991957a2e58ea763a68da22404f48b99703248		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32E3 23044 bytes
font_01_sfnt_off00006667.bin
463b73afec0d8b815705b3a3b0684adc35169bc45bf5fdf9be6f73e0165c6f81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6667 19600 bytes

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