Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1fef315df2b100c…

MALICIOUS

PDF

35.1 KB Created: 2021-06-28 19:48:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6ed2c46872823f0aeadcab5026455001 SHA-1: 56fa2f3534ab18cedc203b142d69b487dab178b6 SHA-256: c1fef315df2b100c00d9e69480ea83a055eb692d95b72f8dfee5c480aaf3841a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promises free in-game currency and hacks for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the structure and 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/robux-hack-no-survey-or-human-verification-no-downloads-game-hack
    • http://digilibfisip.uwks.ac.id/repository/roblox-walk-through-walls-hack-no-cheat-engine_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-builders-club-on-roblox-for-free-2021_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-free-coins-in-minecraft_GM479516143.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-roblox-birthday-cards_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-hack-2021_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-build-a-boat-for-treasure-free-thrusters_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-a-free-roblox-necklace_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-ying-vs-yang-hack_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/comment-jouer-a-roblox-avec-une-manette-free_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-roblox-accounts-google_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-hack-copy-game_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/ho-to-get-free-glowing-skirt-on-royale-high-roblox_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdf
    • http://digilibfisip.uwks.ac.id/repository/minecraft-hacks-115-2_GM479516143.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-free-shirts-and-pants-for-girls_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/hack-volar-roblox_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/hack-de-monedas-de-roblox_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-robux-come_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-heists-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fcc.bin
21a4b5afe33eaaee4dd8642f3c24f66ea3fb7cd96b78341d69ec225e01a9548a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCC 22064 bytes
font_01_sfnt_off00006098.bin
ece13bcb4083c80c665971233256af9538f7382928a0182d86623812c1151ae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6098 20216 bytes

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