Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c765a8dca43d3e7…

MALICIOUS

PDF

61.5 KB Created: 2021-05-10 07:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de4d1790c443572e74ddfd7777898209 SHA-1: 6fb32fa2354cbd6f4785f94c073a6da1e85b3ae1 SHA-256: 8c765a8dca43d3e74b74e59b9c9419052ae74cfec3837236196a6837caaee576
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads. No scripts were extracted, but the structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6869

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/4ha3fel9j5559iv8dnitj4fj4j/11224316772.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/9fdd90cfa54ba2fe3ae0e870833a48a2/dogutarurorobovoxerejusen.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608076e8d9014---gifozevezorapes.pdf
    • http://quickvideo.nl/userfiles/file/pefixebupaditoz.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8017ddf3---68372990447.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/1d9v2g0dsen0vti21jl7h6bep1/zeropof.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/20ca83ec5e92228ed2969ee4e6e0ac5c/29382561113.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/30e59edf06630a32fead9abf361a7936/37666539987.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b79cc58297---watigajataxubawemakebofor.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/jmq8r6fee59itlv9gp4ebel7r4/75205009420.pdf
    • http://anhbanglaw.com/userfiles/file/womagejekix.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608b703b09291---fulolobakitojafa.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/u0nedhhc1na8i0tkfvgip382qn/34047738599.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854a91d1d78---salefafiselipevalupenelip.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe54635d3a---tusozaxikejipijofesawoza.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=oedema+in+pregnancy+nice+guidelines

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