Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce283dbfc84a9d8c…

MALICIOUS

PDF

34.3 KB Created: 2021-06-20 01:49:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ad6523f934b591df155465992e2050b5 SHA-1: 784bc02988a42a2dac37a967fc7a3d76118885d2 SHA-256: ce283dbfc84a9d8c8b14fcd6fe9e9be1ad01fa9c5adf01ed33a167a5e454c7bc
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified as a link farm, that point to external resources related to game cheats and free items. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure reinforces the malicious intent. The primary attack pattern involves directing users to these external links, which likely host further malicious content or phishing attempts.

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.co/app/431946152/free-roblox-t-shirt-templates-game-hack
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-spins-on-coin-master-hack_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-roblox-printables_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/can-i-get-free-robux_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-ways-to-get-robux_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/rbx-hut-promo-codes_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-do-you-install-minecraft-for-free_GM479516143.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-spins-coin-master-legit_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/earn-free-robux_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-ios-jailbreak_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-2021-no-human-verification_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/ways-to-get-free-robux_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/hack-coin-master-dzooka_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-to-download-minecraft-for-free-ios_GM479516143.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-minecraft-codes_GM479516143.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/roblox-toy-codes-free_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-twitter_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/minecraft-bedrock-download-pc-free_GM479516143.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030b9.bin
e925bc5530f89c81787cc358664406e237f926463e450bbf3cbd702b90679b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30B9 21560 bytes
font_01_sfnt_off00005fe6.bin
101cf6fe91b141d9411aa0236265fc09e2526c38a4c4d771cb3bd8d13cc1b1fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE6 19476 bytes

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