Malicious PDF — malware analysis report

Static analysis result for SHA-256 723ca2ec2dc227d3…

MALICIOUS

PDF

63.6 KB Created: 2021-07-13 17:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eacade9ad14aaa0e7d6ff3b51553301e SHA-1: 8aed93b9560d729c7c8f6e9a295da8a061849c09 SHA-256: 723ca2ec2dc227d3b4f187a814bb55fec922525e9532b13cc55a2b43ebefa399
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to compromised websites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, pointing to the use of disposable hosting and compromised CMS uploads to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6819

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 http://adamlegal.com/userfiles/file/tojupesujujoxafi.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ihjt5isai716vddqd2civcotr4/nudujisukiva.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8286decd97---51863398829.pdf
    • http://ampletrekking.com/userfiles/file/76869279988.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/75591d72ec989a5c0893146cbba074a9/18516010962.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085e1204b72f---metajova.pdf
    • http://metamorfoza-krosno.pl/userfiles/file/37663476534.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a374aa78c6d---71859631027.pdf
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/tetofuwufatebuvoja.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/4d2e5793c4a0baf08a619b295d4fa0c9/sopazijurofewakeb.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/9ab622a568574c8b5e4898cab178c8db/tilukimebutibi.pdf
    • http://cohensevents.com/clients/74638/File/3488983380.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/0d56a96391e79e5d3ab41e3b4dd2aca7/muzamiliteboke.pdf
    • https://studiovizia.com/webroot/img/content/files/puxevonakegomakexaxuzuzo.pdf
    • http://suankaew.net/upload/userfile/files/77135314961.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/048c54354ad54bf1d42cc0e79792f5f4/91603049620.pdf
    • http://phpirateboosters.com/clients/867602/File/fuxofiwazatil.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1b2819be6---zabalugoji.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac892e1f26c---89217934500.pdf
    • http://handbook.hu/upload/page/file/noxutemiwamikit.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1a2097089---verib.pdf
    • https://tuttoadomiciliocn.it/file/vigifuweroziwesoji.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=veterans+day+dogs

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