Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf99bbf2d339fb1…

MALICIOUS

PDF

39.0 KB Created: 2020-12-31 08:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0ef41dbb5a6706519aa4fc9f1cce17f SHA-1: 456dd98b515263efcabf9dea99033fb2182ca36d SHA-256: acf99bbf2d339fb107ba4bae200eff87bc89d9918687a16e90235d8f7a682db6
172 Risk Score

Malware Insights

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

The PDF file is identified as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document's structure suggests it is an image-only lure designed to trick users into clicking the embedded URL, which leads to a known malicious site. The ClamAV detection further corroborates the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5418

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://cctraff.ru/123?utm_term=disney+tree+skirt+ebay