Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7ae64a28c59347…

MALICIOUS

PDF

37.3 KB Created: 2021-06-17 13:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 0868084aa8ab11242e5c5b65a250d4b4 SHA-1: 5663e7aff0c3a9866c862bb04bbf7baf3499edd3 SHA-256: da7ae64a28c59347b6c0f548a41e067e9911f8eb013cd00f8c64f11460d3a2af
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains links to compromised WordPress upload directories, suggesting it's designed to redirect users to malicious content hosted on these sites. The document body is heavily obfuscated and appears to be an image-based lure, reinforcing the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5080

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://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/204223a6a18cbb53ee79a298e02b6a03/62221519195.pdf In PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/db38e4996d1213203399f8ca2d114389/dasobofodupemananipe.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/dutobikubow.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b528aabd54---51956213583.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d85962e09---muxefa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=lol+sisters+coloring+pagesPDF link annotation

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