Malicious PDF — malware analysis report

Static analysis result for SHA-256 d110d2a74c0fc5fe…

MALICIOUS

PDF

35.7 KB Created: 2021-06-28 21:38:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: df286462d13dfad2f299077af2578936 SHA-1: 6b470af4ceaa8c7f3c1e224be477f354d572bd53 SHA-256: d110d2a74c0fc5feccee96bdd9d8712bec50fe28f0b4300d939bc7045d107fe3
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 SEO-optimized pages advertising game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a coordinated effort to direct users to potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the embedded URLs and the nature of the content strongly suggest a phishing or malware distribution attempt.

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/roblox-lumber-tycoon-2-infinite-money-hack-game-hack
    • http://library.fk.upnvj.ac.id/repository/how-to-use-cheat-engine-on-roblox-2021_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/www-bandicam-com-free-robux_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/roblox-generator-com_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/hack-prison-miner-roblox_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/can-you-play-minecraft-for-free_GM479516143.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-100-robux-for-free_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/hack-mining-simulator-roblox_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/coin-master-apk-hacked-3526_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/keybinds-v2-free-download-for-roblox-jailbreak_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-coin-master-apple_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-elemental-battlegrounds-roblox-cheat-engine_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/games-on-roblox-that-will-give-u-free-hat-youtubecom_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/free-op-minecraft-servers_GM479516143.pdf
    • http://library.fk.upnvj.ac.id/repository/roblox-sexually-abused_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/obby-for-free-robux-real_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fe2.bin
cf11c6ccabf17b4ac48d0bd973b5707dc44fde8e3ec8ed4e07d41e2d2486cfbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE2 23188 bytes
font_01_sfnt_off00006443.bin
88bde2206bd0bc05c894e923b472be8c49612ee2a4597f3bb082bacb2cb5ac54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6443 19780 bytes

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