Malicious PDF — malware analysis report

Static analysis result for SHA-256 08232a9225df7ec0…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 09:22:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9ac03dd61df7d81c6d66adb418ed3a17 SHA-1: 3de31c65194de76abaa80d6c047fc4990d57f5cf SHA-256: 08232a9225df7ec02b054edf2d9ba484584e4eac958b82c3ac838e9688a9b876
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 appear to be 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 external URIs and a link farm further supports this assessment. No scripts were extracted from this sample.

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/best-free-minecraft-hacked-client-game-hack
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/coin-master-hack-pc-cheat-engine_GM406889139.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/how-do-you-hack-roblox-accounts-2021_GM431946152.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/coin-master-sound-daily-free-spins-link-today_GM406889139.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/what-are-points-for-in-roblox_GM431946152.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/roblox-snow-shoveling-simulator-free-santa-bag-inf_GM431946152.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/coin-master-how-to-get-free-pet-food_GM406889139.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/coin-master-free-spins-hack-2021_GM406889139.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/how-do-you-get-free-roblox-robux-on-roblox_GM431946152.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-robux-without-human-verification_GM431946152.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/roblox-player-speed-hack-script_GM431946152.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/name-that-character-cheats-roblox_GM431946152.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-coins-and-spins-coin-master-2021_GM406889139.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/wwwcoin-master-hack-apk_GM406889139.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/how-to-make-an-audio-for-free-in-roblox_GM431946152.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/how-do-you-get-free-robux-on-survey_GM431946152.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-spins-coins-coin-master_GM406889139.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/roblox-anti-cheat-jailbreak_GM431946152.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-black-wings-roblox-2021_GM431946152.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/get-free-roblox-card-codes_GM431946152.pdf
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-coin-master-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003425.bin
5602f9d6ccb154049e3f28e4a652392b8862a77d734f3941f1b4e05025d6bddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3425 21384 bytes
font_01_sfnt_off0000628e.bin
de6dea86fd6d9d2ae37ee86cd92174b2735422e57a595b8bae0417e8dfd3f9d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628E 18492 bytes

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