Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a3befd4c0a239d…

MALICIOUS

PDF

35.6 KB Created: 2020-11-14 09:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81128469e765f44941abdad026f212f8 SHA-1: 5ef95839a82c19f08a0e1da2cf3578377b9b135e SHA-256: 94a3befd4c0a239de02cb5e84fdeebb22fc9f93bd3d53d5f0bbe8a928ad556eb
172 Risk Score

Malware Insights

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

The PDF contains a single image and minimal text, characteristic of a screenshot lure. It includes a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?utm_term=linear+equation+with+one+variable+worksheet+pdf'. ClamAV also detected this as a phishing trojan. The combination of these factors strongly suggests a phishing attack or a download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6962

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-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 35 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/aws?utm_term=linear+equation+with+one+variable+worksheet+pdf

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