Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f776f3c7d1aca04…

MALICIOUS

PDF

36.8 KB Created: 2021-07-07 00:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 813a1e5b0c8efc7bc34cc30049cbfb79 SHA-1: fe29196e94f61c5c1682eae628870a4258b3670b SHA-256: 2f776f3c7d1aca04069aedb09ee982bb0fc14b1353c97782c43c3be516b722b0
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure due to its small size and image-based content. It contains multiple links pointing to compromised WordPress upload directories, suggesting an attempt to host malicious files or redirect users to phishing sites. No scripts were extracted, but the presence of external links indicates a likely download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7016

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 36 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://careersourceokaloosawalton.com/files/public/62341602131.pdf In PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1d610fc5ad2e9979f4a0f57ed102b9c9/25153067173.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c2b541aa6---futewirugekarojipalezum.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/xafevipubebavebosevojif.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/57899158697.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac689770cf---45888077288.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=podomeres+in+cockroachPDF link annotation

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