Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c9b60bcbb109ba…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 02:13:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 36342f17835bed5eab4b12a8c563a306 SHA-1: c957bcf37e91d4d56618a75683ca5a9f9062b233 SHA-256: e2c9b60bcbb109ba99a281f73007cab37f24603ebda216ec6686a26f47f3c7f1
122 Risk Score

Malware Insights

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

The PDF document contains numerous links to external PDFs hosted on an IP address, promising free in-game currency and hacks. This indicates a likely phishing or scam attempt to lure users into downloading further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/431946152/robux-generator-no-human-verification-2021-game-hack
    • http://1.179.208.67/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/free-games-like-coin-master_GM406889139.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/today-coin-master-spin-free_GM406889139.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/free-robux-app-2021_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/free-coins-on-coin-master_GM406889139.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/roblox-free-roblox-cards-2021_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/claim-free-spins-coin-master_GM406889139.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/coin-master-gold-cards-hack_GM406889139.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/robuxy-com-free-robux_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/coin-master-redeem-code-free_GM406889139.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/coin-master-tricks-and-hacks_GM406889139.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/roblox-free-models_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/how-to-hack-coin-master-ios_GM406889139.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/how-to-get-clothes-in-roblox-for-free_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/roblox-game-card-generator-download-free_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/hack-list-for-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003126.bin
ddfef4a41aca6fc59b26cfa9e28ffd1ebc9b89181f256f2dc3d15e49251d32cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3126 22212 bytes
font_01_sfnt_off000062bb.bin
5abbd4c210824a7a1ff79971cc18208e5dacb0982a65bcd012ada1701e003c65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BB 19572 bytes

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