Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c2d9a6f7643502…

MALICIOUS

PDF

51.2 KB Created: 2021-07-18 00:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4daacbc8fda115b7ba113c7d7145a983 SHA-1: 466922044dd08496808777aa7bc61dcc7b02c9a8 SHA-256: a0c2d9a6f764350225a15810d5361fe487a69cb4e26564301f3a5d846a61504a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised CMS upload directories, suggesting a link farm designed to host and distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is intended to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8963

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/5hmuvhsjq9rhkme70ae157u0gh/jebujezojuxekud.pdf In PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/f0a8c84da7cfdaab65a874195994eeca/79359759846.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/xovaniwapezovazisalukaz.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/kaduvozugazolidiso.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799c8ddf8eb---21369948539.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/vekekaxuditixexi.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/9d96ce6419d199d5e0d96868a4e19aa9/25002989720.pdfIn PDF document text
    • http://idcla.net/upload/files/defofesujulaxebo.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/somijufilelava.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/fekogazisu.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/2da338e9cfecffff385d2add4be8bd9e/77219157967.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/642f372a17d217ab4b62ba1dca3d56aa/6403296142.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/l4j75o75mo66sl38h5q7c3e6vd/77867472728.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/n60ka4irpq99li47jpduss96dt/robowojukawoxevidi.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/22004745513.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/rtqrogv1ve4hannstiv2ork6ci/podiki.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/79529805230.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/xediketataguzode.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/jesikevatataw.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/3617092be08089ee2dd510c425f03bef/90142350612.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9fa238fce7---nurowakaxa.pdfIn PDF document text
    • https://eucolait.eu/userfiles/files/jaguwuvof.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/e0d4b488dce8d4cbf4fdd5f32baea7a9/sodetariwimuzudisekon.pdfIn PDF document text
    • http://saxons99.com/clients/5/5f/5faa49e4155ddd0d4faf97b0d7aa3dde/File/xelelutod.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/86d0dc0a53c0d02f0840151b7628ec5b/nulepozufige.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=different+types+of+biblical+fastingPDF link annotation