Malicious PDF — malware analysis report

Static analysis result for SHA-256 f784a0b18b4b0754…

MALICIOUS

PDF

37.7 KB Created: 2021-07-03 22:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: b72b2b5310bb5b2cc6a34a1e34606256 SHA-1: e8f7e04f499ebb36792485fe923d98e0c5ca131c SHA-256: f784a0b18b4b07544f9c7abc3ebc49c27688e9d02018c3f361bd090ed4460b8d
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9716

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 https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da2f967861---67137813998.pdf In PDF document text
    • http://pnmanagementsolutions.in/uploads/zurikezotor.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/76188724441.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/4v1427htfbeais2s468mca1r27/vaxenasanedopat.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/91541211343.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/pesufedibajuni.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/bcr2ao5qe4m25og77ekprdpmqm/sazixa.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c34ef3163b1---varoveruzom.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210619_190304.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=chemical+principles+8th+edition+pdfPDF link annotation

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