Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4cb192c17d714c…

MALICIOUS

PDF

12.4 KB Created: 2015-07-15 14:39:15 +04:00 Authoring application: DOMPDF
MD5: ce32bb42a06dea47140281b2bd4e5a8c SHA-1: a9db18576739066f12a714d0037fd4344da2588f SHA-256: 8d4cb192c17d714c78b7ac9fbd74755c57ac515431c22e286934702d5c28f577
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded URLs pointing to various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged the document as malicious. The purpose appears to be to redirect users to these external sites, potentially for SEO spam or to host further malicious content.

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=144.1&wehsa=1&pdf=144
    • http://fresh2death.com/index.php?article=2217.1&lzrlo=1&pdf=2217
    • http://geekseals.com/index.php?article=2299.1&kcbpn=1&pdf=2299
    • http://photo-file.ru/index.php?article=1614.1&wehsa=1&pdf=1614
    • http://www.mantrabeautybar.ca/index.php?article=1024.1&rukbv=1&pdf=1024
    • http://photo-file.ru/index.php?article=1071.1&wehsa=1&pdf=1071
    • http://ve-klubber.dk/index.php?article=1929.1&jzwgf=1&pdf=1929
    • http://bmwt.pt/index.php?article=194.2&qvacx=2&pdf=194
    • http://propertarian.net/index.php?article=97.1&jdxyr=1&pdf=97
    • http://photo-file.ru/index.php?article=1871.1&wehsa=1&pdf=1871
    • http://photo-file.ru/index.php?article=420.1&wehsa=1&pdf=420
    • http://photo-file.ru/index.php?article=1920.1&wehsa=1&pdf=1920
    • http://marmoleraflores.com/index.php?article=1666.2&qultr=2&pdf=1666
    • http://photo-file.ru/index.php?article=1178.1&wehsa=1&pdf=1178
    • http://konserborsasi.com/index.php?article=1777.1&ntrdf=1&pdf=1777
    • http://photo-file.ru/index.php?article=2031.1&wehsa=1&pdf=2031
    • http://edezigntesting.com/index.php?article=127.1&vwddn=1&pdf=127

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