Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a16af44822ea8d2…

MALICIOUS

PDF

12.6 KB Created: 2015-07-15 14:41:49 +04:00 Authoring application: DOMPDF
MD5: 0628b8f2a0f8bcbc80eba44c88c37467 SHA-1: bef9fbd67a6b68cec60d3a942a65f9bfd583543b SHA-256: 0a16af44822ea8d2d492f2723a2a3fd0c8d1bee75f86815b03fa2ed347c35e0f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various external websites. The ML classifier also flagged the document as malicious. While no scripts were extracted, the sheer volume of links suggests an attempt to manipulate search engine results or redirect users to potentially malicious content hosted on these domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8835

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=1324.1&wehsa=1&pdf=1324
    • http://propertarian.net/index.php?article=428.1&jdxyr=1&pdf=428
    • http://www.mantrabeautybar.ca/index.php?article=1063.1&rukbv=1&pdf=1063
    • http://photo-file.ru/index.php?article=1192.1&wehsa=1&pdf=1192
    • http://xserve-online.de/index.php?article=135.1&yucuw=1&pdf=135
    • http://photo-file.ru/index.php?article=1683.1&wehsa=1&pdf=1683
    • http://domedesigner.com/index.php?article=2091.1&urgni=1&pdf=2091
    • http://marjangecevic.com/index.php?article=163.1&vgslo=1&pdf=163
    • http://www.kingdomfaithchurch.org/index.php?article=706.1&fksac=1&pdf=706
    • http://photo-file.ru/index.php?article=1782.1&wehsa=1&pdf=1782
    • http://photo-file.ru/index.php?article=634.1&wehsa=1&pdf=634
    • http://photo-file.ru/index.php?article=128.1&wehsa=1&pdf=128
    • http://urbanindoorgs.com/index.php?article=1931.1&lkbfl=1&pdf=1931
    • http://photo-file.ru/index.php?article=2186.1&wehsa=1&pdf=2186
    • http://unibindsport.no/index.php?article=831.1&ufueq=1&pdf=831
    • http://photo-file.ru/index.php?article=1874.1&wehsa=1&pdf=1874
    • http://websitedesignindelhi.co.in/index.php?article=330.1&uoohx=1&pdf=330

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