Malicious PDF — malware analysis report

Static analysis result for SHA-256 4722bb1835603947…

MALICIOUS

PDF

37.3 KB Created: 2021-06-23 10:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bf228791c1fbd7bd99230fe0881b5eba SHA-1: f8c4ba92431351eb12e6069f346b3549040a14a2 SHA-256: 4722bb183560394761bcf1dcf225a0bafb6e6fda1d8127578e9d6dc6dc0afb79
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable link. Several URLs hosted on compromised CMS platforms were extracted, suggesting a distribution network for malicious content. Although no scripts were directly extracted, the PDF structure and heuristic firings indicate a likely attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5080

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 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://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/9a06f390d6642fad9c31541167670ffa/82071982902.pdf In PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901d58bff59---nupakujonejulepaviniwemaj.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/77480476170.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/d3fnfi52p1gjav52g4c3pk8a94/dazigerufuvozodasuraga.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/4migbkfsbcma7gmaqtmdp18j1p/sijofakavezivupitotomener.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=price+elasticity+of+demand+and+total+revenue+pdfPDF link annotation

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