Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd1b6d0eba2c13d…

MALICIOUS

PDF

44.9 KB Created: 2021-03-10 00:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 573c8609758ff08377cb43d364eb2586 SHA-1: 764e460afe0a3ed934fd50b5508a0d409ab90357 SHA-256: 1bd1b6d0eba2c13d3429e9ac87b4348643aa59e0673ab842aaf567695884050c
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is designed as a phishing lure, presenting itself as a document but containing a hidden malicious link. The heuristic PDF_IMAGE_LURE indicates it's an image-based document with an action trigger, and PDF_MALICIOUS_REDIRECTOR_LINK confirms it points to known malicious infrastructure. The embedded URL likely leads to a phishing site to harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6563

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 44 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.
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