Malicious PDF — malware analysis report

Static analysis result for SHA-256 751caa43b8488abb…

MALICIOUS

PDF

33.3 KB Created: 2021-07-06 16:49:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8e01fe727bc34873e2726f3a701f2ab8 SHA-1: 6c1746d89fce83e1adf163c6d2c8af92273bd1ec SHA-256: 751caa43b8488abb7b13d94fe4c4a7cdfc4adf0118ec788a6aeb8fb28b399f8b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a malicious link farm, heavily promoting game cheats and hacks through numerous embedded URLs. The ML classifier and the PDF_SEO_LINK_FARM heuristic strongly indicate malicious intent. The document likely serves as a lure to direct users to external sites that may host malware or facilitate further compromise.

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/static-moonactive-game-hack
    • http://library.unissula.ac.id/fk/repository/roblox-phantom-forces-money-cheat_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-arcane-adventures-hack-script_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/how-to-hack-get-money-in-roblox-tycoon-simulator_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/free-spins-coin-master-links-blogspot_GM406889139.pdf
    • http://library.unissula.ac.id/fk//repository/hack-roblox-players_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/hack-the-coin-master-game_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-free-builders-club-2021_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-gift-card-online-free_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/robuxian-com-free-robux-code-generator_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/getrobux-now_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-how-to-hack-to-get-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/free-tiktok-likes-generator_GM835599320.pdf
    • http://library.unissula.ac.id/fk/repository/game-roblox-online-free_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-dayz-cheat-engine_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-c9m_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox40com-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/pokemon-go-free-kanto-tour_GM1094591345.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002e90.bin
eae55109fe97369d8b02a3f0bdc4983e1f4182905fe203a5c771f52476dc04ba		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E90 22420 bytes
font_01_sfnt_off0000605d.bin
d942d3997741433eac321740d06464204a1c132eec26b7d4f5b5c0c9669a93de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605D 17948 bytes

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