Malicious PDF — malware analysis report

Static analysis result for SHA-256 1240e1110f106d90…

MALICIOUS

PDF

32.9 KB Created: 2021-07-03 18:01:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 93e224c772f9ab09f938bb90dba9625a SHA-1: ac1c736ffd2dde60f8dccdfc67c13182d403ab3d SHA-256: 1240e1110f106d90a6a615b2681ed39c8321a82e22e651ebb688e0cf0b397ff9
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are related to game cheats and hacks, suggesting a lure for users to download malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' heuristic further supports a malicious intent. The document's content and structure indicate it is designed to trick users into visiting potentially harmful 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.tw/app/479516143/minecraft-realms-free-codes-game-hack
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-codes-inspect-element_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-admin-roblox-any-game_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/www-cheatsk-com-coin-master-hack_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/www-roblox-robux_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-to-hack-robux-in-roblox-script_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/robux-hack-no-survey-2021_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-game-free-spin_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-xray-hack_GM479516143.pdf
    • http://perpustakaan.poltekom.ac.id/repository/final-stand-hack-roblox_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-minecraft-alt-generator_GM479516143.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/apps-for-free-robux_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/robux-download_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f50.bin
9cd260d4c83624971a897dc11079120cae1f2cbfe1de07a3aecc49f88e8573b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F50 21216 bytes
font_01_sfnt_off00005d25.bin
df10bd94edc5891a154685fbdda3a803e57035b64e9c0e6d7a5459cca4336595		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D25 18508 bytes

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