Malicious PDF — malware analysis report

Static analysis result for SHA-256 2547c2bc53d380b9…

MALICIOUS

PDF

33.1 KB Created: 2021-07-06 01:11:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b3ca59ffc7859f4ea82875e311fcc5a3 SHA-1: 2ee8e0970231776839c68ecabdff83c9b2f4f0c7 SHA-256: 2547c2bc53d380b9fbcd3a1f5055dd177f66171c86bff4fe45fb572dcd55f268
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 hosted on domains related to game cheats and free in-game currency, suggesting a lure for users to download potentially malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, and the ML classifier strongly flags the document as malicious. The presence of a download button lure further supports this 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/431946152/freerubux-game-hack
    • http://lib.untad.ac.id/repository/cheat-roblox-booga-booga-2021_GM431946152.pdf
    • http://lib.untad.ac.id/repository/how-to-get-free-promo-codes-roblox_GM431946152.pdf
    • http://lib.untad.ac.id//repository/free-minecraft-account-generator_GM479516143.pdf
    • http://lib.untad.ac.id/repository/how-to-hack-onto-a-roblox-account-2021_GM431946152.pdf
    • http://lib.untad.ac.id/repository/roblox-mba-free-robux_GM431946152.pdf
    • http://lib.untad.ac.id/repository/best-free-roblox-exploits-v3rmillion_GM431946152.pdf
    • http://lib.untad.ac.id/repository/cheat-codes-for-building-simulator-roblox_GM431946152.pdf
    • http://lib.untad.ac.id/repository/minecraft-redeem-code-free_GM479516143.pdf
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-june-2021_GM431946152.pdf
    • http://lib.untad.ac.id/repository/best-free-roblox-exploit-auto-update_GM431946152.pdf
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-and-bc-2021-legit_GM431946152.pdf
    • http://lib.untad.ac.id/repository/roblox-apoc-rising-cheat-code_GM431946152.pdf
    • http://lib.untad.ac.id/repository/roblox-phantom-forces-hack-2021_GM431946152.pdf
    • http://lib.untad.ac.id/repository/roblox-future-tycoon-money-hack_GM431946152.pdf
    • http://lib.untad.ac.id/repository/how-to-hack-money-systems-on-roblox-tycoons_GM431946152.pdf
    • http://lib.untad.ac.id/repository/coin-master-mod-free-download_GM406889139.pdf
    • http://lib.untad.ac.id/repository/robux-gift-card-online-free_GM431946152.pdf
    • http://lib.untad.ac.id/repository/spam-hack-for-roblox_GM431946152.pdf
    • http://lib.untad.ac.id/repository/how-to-get-hacks-in-island-life-roblox_GM431946152.pdf
    • http://lib.untad.ac.id//repository/coin-master-free-spins-daily-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c94.bin
338c43cbe26c1e2ddf6f884b76f0e257c691c76e7eae7ae6cae854bc27228eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C94 22124 bytes
font_01_sfnt_off00005dcd.bin
a4910544a3301e21d5425f47d387c0dcd2b1454e32e0c532c02705c370365377		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCD 18572 bytes

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