Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8c7542bab9ad4b…

MALICIOUS

PDF

35.6 KB Created: 2020-11-22 01:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bf432b414ad52e37b52352787a42618 SHA-1: fbcddc74265419b842ce1cfbcea07637ce5a0159 SHA-256: 1a8c7542bab9ad4b2da95e6c0ce55dd0c7441904f86b94e129a8166081e3bbe0
172 Risk Score

Malware Insights

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

The PDF was identified as malicious by multiple heuristics, including a critical finding of a link to known malicious redirector infrastructure. The document body is heavily obfuscated, but the presence of embedded URLs and the overall structure suggest a phishing lure. The primary attack vector is likely spearphishing attachment, leading to exploitation for client execution via a redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6860

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 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://ggtraff.ru/aws?utm_term=civ+6+guide+pdf
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5fa0eda80b131.pdf
    • https://jowovodepavilim.weebly.com/uploads/1/3/4/6/134651336/nikarit_jijolexasojuxe

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