Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67ad5a502e77723…

MALICIOUS

PDF

51.1 KB Created: 2021-09-08 10:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: c9927082d752afd7e5d4b2f554e2060f SHA-1: 226b7f465d20b860fd9ae6900004e2bd6a135e31 SHA-256: d67ad5a502e777237eb09a4f946997c3231d9c55a15f0f6fd6e306facaf4487a
94 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users. The PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristic indicates multiple distinct hosts were involved in this distribution method.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4747

Heuristics 4

  • 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.
  • 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://rts-wm.com/ckfinder/userfiles/files/zusunul.pdf In PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/4830e6f0643f2c4646989d366f29e7b1/rojusijezumekirewatiz.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/064884b0ef060c37d74625f02e426732/menozagoxijogutemoj.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/vuzasisufekenan.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/c3ej2kg4k4pdifnuacjh082kbb/81214928010.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/bdb29319d810730aa4fdc1cf211e55f8/33004659857.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=modern+elementary+particle+physics+kane+pdfPDF link annotation

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