Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba200f66836f57a…

MALICIOUS

PDF

43.3 KB Created: 2021-05-17 16:08:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a5298ba8762f79dc7f97f0cee0b98eee SHA-1: a60fda143c1702f8454c4ef4a24474a8bfc190c0 SHA-256: 1ba200f66836f57a9bb4cf8089b5cba687acc26f9f7cc6c263cc1918345ad87b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which are related to game hacks and free in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier strongly suggests maliciousness. The document likely serves as a lure to direct users to malicious websites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/roblox-prison-life-hack-game-hack
    • http://en.leechan.com.cn/Public/upload/editorfiles/google-coin-master-free-spins_GM406889139.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/google-how-do-you-get-robux_GM431946152.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/claimrobux-net_GM431946152.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/free-coin-master-spins_GM406889139.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/give-free-robux_GM431946152.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/100-free-spins-coin-master_GM406889139.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/how-to-get-free-robux-without-offers_GM431946152.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/best-free-minecraft-hacked-client_GM479516143.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/how-to-hack-coin-master-ios-2021_GM406889139.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/static-moonactive-net-free-spins-coin-master_GM406889139.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/get-free-robux-without-human-verification_GM431946152.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/cute-free-roblox-outfits_GM431946152.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/robux-gift-card-free_GM431946152.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/can-i-get-free-robux_GM431946152.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
    • http://en.leechan.com.cn/Public/upload/editorfiles/how-to-get-free-robux-games_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a90.bin
b6a4dcb10a1c238d51ec59618541be709b036a7d1d2504b1ea3cf24d6ab9a273		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A90 25736 bytes
font_01_sfnt_off00008676.bin
407d6fb8d9efb45a2b1cddcfd151d3a069902e857cdd2d484da7c19786549282		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8676 18456 bytes

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