Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c33a5590de1f93…

MALICIOUS

PDF

67.6 KB Created: 2020-11-25 18:38:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2920d87c7d1c09cdccc2a8115d13079f SHA-1: 1930d868646fd3d9701299dd44d61eae35017d33 SHA-256: 77c33a5590de1f931dd34ceefb63275e12268a898559aacb45738f21c66460fb
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are identified as malicious redirectors or part of a link farm. The document body, though heavily obfuscated, suggests it is presented as a worksheet, likely to deceive users into clicking these malicious links. The presence of embedded URLs and the detection by ClamAV as a phishing trojan strongly indicate a malicious intent to redirect users to harmful infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8907

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.
  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=evolution+the+mind%2527+s+big+bang+worksheet
    • https://wugepazi.weebly.com/uploads/1/3/4/3/134348030/322518.pdf
    • https://cdn-cms.f-static.net/uploads/4456393/normal_5fbd847859632.pdf
    • https://cdn-cms.f-static.net/uploads/4409630/normal_5fb821278f7b0.pdf
    • https://xalesuben.weebly.com/uploads/1/3/4/3/134368019/6086584.pdf
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5fb2dbe7d75de.pdf
    • https://cdn-cms.f-static.net/uploads/4389571/normal_5f8e4002107cd.pdf
    • https://cdn-cms.f-static.net/uploads/4380681/normal_5f98807fa0452.pdf
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5fb837d367dfb.pdf
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f8fec0db7dc9.pdf
    • https://cdn-cms.f-static.net/uploads/4410727/normal_5fa0b9bec3020.pdf
    • https://uploads.strikinglycdn.com/files/bbaa4e13-0cef-4ed6-ac53-428f0f2865e6/74036700491.pdf
    • https://uploads.strikinglycdn.com/files/1f17aaa9-6601-4eea-841b-303245f76813/26878023019.pdf
    • https://s3.amazonaws.com/fowikorejodi/durapomelovujisirodukugex.pdf

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