Malicious PDF — malware analysis report

Static analysis result for SHA-256 13797678052dcac9…

MALICIOUS

PDF

50.6 KB Created: 2021-01-06 07:15:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 17afc67e8474797fb1d95ff97be519f2 SHA-1: ad0cf4329c633aa2b5ce66bcea9a8622f5a92964 SHA-256: 13797678052dcac9a2782f3ac1b928708c1a4428376d274875e5d01968f22315
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits malicious characteristics, including a critical heuristic firing for linking to known malicious redirector infrastructure. It also contains a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were extracted, the embedded URLs and the nature of the PDF structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6098

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gettraff.ru/aws?utm_term=ralink+bluetooth+pcie+adapter In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369508/normal_5fd03e0d53443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414687/normal_5f9b67fcccc81.pdfIn PDF document text
    • https://fijefozumomaba.weebly.com/uploads/1/3/4/4/134491855/4683445.pdfIn PDF document text
    • https://giwelexe.weebly.com/uploads/1/3/0/8/130814055/feberopovase.pdfIn PDF document text
    • https://gukijofajileraw.weebly.com/uploads/1/3/4/3/134392650/3d1ced3a2ddbc9.pdfIn PDF document text
    • https://zonotilikoper.weebly.com/uploads/1/3/1/0/131071062/6697247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_5fdc496d3ce90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380675/normal_5f8ffb01df796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5fb5a3f28a76f.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/didn_t_answer_in_spanish.pdfIn PDF document text

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