Malicious PDF — malware analysis report

Static analysis result for SHA-256 c324075fb5927930…

MALICIOUS

PDF

11.5 KB Created: 2015-07-15 14:38:53 +04:00 Authoring application: DOMPDF
MD5: 8d0d109ece19fa14c73706aa7f72e44c SHA-1: 82de02283cbd7ad81edc7222f4198a01819e9986 SHA-256: c324075fb59279300266b70b3d19c8206d1fc423b8b8cf9dc55a3542b382c19f
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs pointing to SEO-optimized websites. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting the document's primary purpose is to redirect users to these sites. The ML classifier also flagged the PDF as malicious. No scripts were extracted, and the document body text was heavily obfuscated, making it difficult to determine a more specific user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8959

Heuristics 2

  • 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 http://photo-file.ru/index.php?article=170.1&wehsa=1&pdf=170
    • http://information32.org/index.php?article=2324.1&ugibr=1&pdf=2324
    • http://hotrodderclassifieds.com/index.php?article=483.1&hjjgr=1&pdf=483
    • http://photo-file.ru/index.php?article=1200.1&wehsa=1&pdf=1200
    • http://riddlet.com/index.php?article=1062.2&bxiuo=2&pdf=1062
    • http://photo-file.ru/index.php?article=625.1&wehsa=1&pdf=625
    • http://TomOn.tv/index.php?article=2321.1&oeyju=1&pdf=2321
    • http://stylereaction.com/index.php?article=1915.1&fipzp=1&pdf=1915
    • http://www.masajesmexicali.com/index.php?article=349.1&pjtcs=1&pdf=349
    • http://photo-file.ru/index.php?article=1185.1&wehsa=1&pdf=1185
    • http://photo-file.ru/index.php?article=1058.1&wehsa=1&pdf=1058
    • http://photo-file.ru/index.php?article=20.1&wehsa=1&pdf=20
    • http://trans-cultures.eu/index.php?article=2109.1&asedt=1&pdf=2109
    • http://photo-file.ru/index.php?article=1746.1&wehsa=1&pdf=1746
    • http://lifesweetner.es/index.php?article=1335.1&wddqo=1&pdf=1335
    • http://photo-file.ru/index.php?article=1635.1&wehsa=1&pdf=1635
    • http://www.mantrabeautybar.ca/index.php?article=1568.1&rukbv=1&pdf=1568

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