Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b56a494cdf46b9a…

MALICIOUS

PDF

84.6 KB Created: 2020-12-15 14:03:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5082d7c531d32747f2d9c687f05d9c47 SHA-1: 7dedea31f1c16821f26d6fca924d5a8f381f4ac5 SHA-256: 0b56a494cdf46b9ae229e50aad240cce4575c25f730faa1937d990410d57b86d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are generated for SEO purposes, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8500

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/aws?utm_term=hogwarts+mystery+gobstones+answers+tonks
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/tabokoregageb_desegale.pdf
    • https://kulufitobapesad.weebly.com/uploads/1/3/4/4/134443603/5777135.pdf
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5f8a81dedcb87.pdf
    • https://s3.amazonaws.com/henghuili-files/kudelixeniviroruwizurakun.pdf
    • https://s3.amazonaws.com/lanubili/rujoseditavunedosowul.pdf
    • https://static1.squarespace.com/static/5fce70300c09975df17cda89/t/5fd072ffa4b4ef2db6a6212e/1607496449964/91919177185.pdf
    • https://static1.squarespace.com/static/5fc5ca83f9866f3fd2f56add/t/5fc6b2a33485235c86b4ecda/1606857379295/40176928850.pdf
    • https://static1.squarespace.com/static/5fc534d7be9b693951270167/t/5fc5e83a4f98375720ab17d7/1606805562428/cheap_studio_monitors_pair.pdf
    • https://static1.squarespace.com/static/5fc5a9efc6d9645836428c95/t/5fc6dda4ad3e641192349d91/1606868389313/bapamivugumikiketizozir.pdf
    • https://s3.amazonaws.com/xenavuxa/98612047765.pdf
    • https://static1.squarespace.com/static/5fc4f8ee085bf90c0e173f98/t/5fd66cc8154d727871ed400e/1607888090446/37468588472.pdf

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