Malicious PDF — malware analysis report

Static analysis result for SHA-256 82aedf51b062c455…

MALICIOUS

PDF

43.0 KB Created: 2021-09-08 09:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0aad942f50ccbe5fda7f8379c724c26f SHA-1: 6cf9a6120c319523384e3c8ed17f80c1eb267c28 SHA-256: 82aedf51b062c455ba5d0aa62856859320bca145a99873c09962e9ef17a0cba6
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to potentially compromised or disposable hosting. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also flagged it as malicious, suggesting it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7119

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 http://cariboohose.com/userfiles/file/84310009971.pdf In PDF document text
    • http://www.hangmandigital.com/files/file/75903787108.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/kepexopezekodu.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/77545133531.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725c929939d---86023715170.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/58007324164.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/14738761397.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/11006782348.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608648878285e---tugobugunafivulewibakub.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160890a8631360---siwalofomub.pdfIn PDF document text
    • http://kuppersbusch-center.ru/uploads/files/164638691.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/79711242719.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/89025260059.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/4c87fd0d3fef79b8466b94d8542d844e/worikenumibusiremalumufa.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/luxofotupasevejotixebagog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=nitco+tiles+price+list+pdfPDF link annotation

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