Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee4c74d1da4f10f…

MALICIOUS

PDF

37.4 KB Created: 2021-07-04 05:35:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 64e943de459824b415d58fb312a649b3 SHA-1: 274abe5081b841a794a3699f142e379972d36dc9 SHA-256: 4ee4c74d1da4f10f1778215970d55bd12fd8395488fcf7aaa1350f676c7e9711
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on suspicious domains and offer game cheats or hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a coordinated effort to direct users to potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/free-coin-master-coins-and-spins-game-hack
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/how-to-use-cheat-engine-65-on-roblox_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/obby-gives-you-free-robux-no-password-required_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/today-coin-master-spin-free_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-minecraft-mods-for-ps4_GM479516143.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/coin-master-hack-generator-tool_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/https-free-robux-no-download_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/minecraft-ps4-free_GM479516143.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/artmoney-robux-hack_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/cheat-codes-for-roblox-android_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/roblox-gift-card-for-free_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-shirts-roblox-that-i-can-copy_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/roblox-password-hacker-august-2021_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-2021-robux_GM431946152.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/static-moonactive-net-rewards-2021_GM406889139.pdf
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-coins-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031aa.bin
78c3929653e2cca4afb2af097f389e92ca57220eec1bb4b24a0868138424da9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31AA 22908 bytes
font_01_sfnt_off00006530.bin
c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6530 2896 bytes
font_02_sfnt_off00006f15.bin
cc12283f691ecd9c6c4381c5355a15c3235cfa1ea9601b68c1f91d3883d88a7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F15 18348 bytes

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