Malicious PDF — malware analysis report

Static analysis result for SHA-256 3757096e4303d4f8…

MALICIOUS

PDF

37.3 KB Created: 2021-09-03 07:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: f80a8bb165dbd00d296feffa1c60b115 SHA-1: d1234b3d8346b4318ae65e11f329e573c11d9f38 SHA-256: 3757096e4303d4f86bd748fba0d48e5a7ce9fde0f1891b86a15c54afd97df3ea
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its structure, containing minimal text and an image designed to deceive users. It directs users to a compromised WordPress site, which likely serves as a distribution point for further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6864

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
  • 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 37 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 http://doorsatyrau.com/ckfinder/userfiles/files/45632910404.pdf In PDF document text
    • http://ajisushionline.com/uploads/files/faxuvibidan.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/14f0jq8kjan6dvo04tf2suir6g/51955046189.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9b7cd3379---88712493990.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/zidog.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/87573132053.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/1d8d080b69c71450e9fdcd4d33f1aab5/bixezilawuzaz.pdfIn PDF document text
    • http://anhuicrew.com/uploIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=define+linear+function+pdfPDF link annotation

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