Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1b755947d64367c…

MALICIOUS

PDF

56.7 KB Created: 2021-07-28 04:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: cb4a568f172b547f5f8a160c62aa993c SHA-1: ea949c942d52beddf78db0824cf54d0c39002783 SHA-256: a1b755947d64367c2f386101cd36c8f35f3e374096b289ec7037eadb634fdd6b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate it contains a link farm pointing to compromised WordPress upload storage, suggesting it is used to host malicious content. The PDF also contains embedded URLs that likely lead to further malicious sites or payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5458

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nepalmicrofinancesummit.org/userfiles/files/10645950194.pdf In PDF document text
    • https://p99.tw/pro_pic/files/73836976422.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/12885139.pdfIn PDF document text
    • http://614move.com/clients/4890/File/60276987406.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ef90261ee---22821765460.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/62a7a6d67c1eb7aee2075e12c3bad3c8/pubopakopa.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ddd2j0kvjv5ueqn8qq4vofah03/15883387312.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=los+continentes+para+imprimirPDF link annotation

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