Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fad1610c46b9410…

MALICIOUS

PDF

35.0 KB Created: 2021-07-08 16:40:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 057214223d254dfc6ae8318254fc66e2 SHA-1: 66a7c7607742c525141d8fbb0a219585a164e568 SHA-256: 4fad1610c46b9410f3f900399d88a184bed7513b9aac20c7eebb314ae9f86f59
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that link to websites offering game hacks and cheats, suggesting a phishing or malware distribution attempt. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' lure reinforces the deceptive nature of the document. The primary goal appears to be directing users to download potentially harmful files from the listed URLs.

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/coin-master-hack-ios-no-human-verification-game-hack
    • http://library.acehresearch.org/repository/coin-master-free-download-for-pc_GM406889139.pdf
    • http://library.acehresearch.org/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • http://library.acehresearch.org/repository/tower-of-hell-roblox-hack_GM431946152.pdf
    • http://library.acehresearch.org/repository/avatar-de-roblox_GM431946152.pdf
    • http://library.acehresearch.org/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdf
    • http://library.acehresearch.org/repository/coin-master-attack-hack-apk_GM406889139.pdf
    • http://library.acehresearch.org/repository/coin-master-gold-cards-free-2021_GM406889139.pdf
    • http://library.acehresearch.org/repository/coin-master-hack-tool-download_GM406889139.pdf
    • http://library.acehresearch.org/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • http://library.acehresearch.org/repository/hack-roblox-with-python_GM431946152.pdf
    • http://library.acehresearch.org/repository/minecraft-gun-games-free_GM479516143.pdf
    • http://library.acehresearch.org/repository/hacks-client-for-roblox-wild-revolvers_GM431946152.pdf
    • http://library.acehresearch.org/repository/how-to-hack-in-roblox-apocalypse-rising-2021_GM431946152.pdf
    • http://library.acehresearch.org/repository/coin-master-hack-download-apk_GM406889139.pdf
    • http://library.acehresearch.org/repository/free-space-in-roblox-bubble-gum-simulator_GM431946152.pdf
    • http://library.acehresearch.org/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://library.acehresearch.org/repository/free-robux-sites-2021_GM431946152.pdf
    • http://library.acehresearch.org/repository/coin-master-game-free-download-for-pc_GM406889139.pdf
    • http://library.acehresearch.org/repository/how-to-change-username-on-roblox-for-free_GM431946152.pdf
    • http://library.acehresearch.org/repository/minecraft-free-play-now_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000345b.bin
d78a47208240b1c4d64406672c7b483d43fd712fa6c3c61e7a6ee101d6fecb61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x345B 22180 bytes
font_01_sfnt_off00006563.bin
88fb8b3c7a9b3df30c05bcae515cb7ddc02cf0fbe643693df1a9fc6a8a33268e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6563 18540 bytes

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