Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ffe14ed460c931…

MALICIOUS

PDF

10.6 KB Created: 2015-07-15 14:39:13 +04:00 Authoring application: DOMPDF
MD5: e18260a1da969cc12f691d99b9b32eef SHA-1: 406ce4f6cceda2ad39faf4565ed6fa089b2c54d8 SHA-256: b9ffe14ed460c931a124cb2ffa5c534cd2b7a35f230c3f7f8f7b118a1f91ffc6
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a large number of embedded URLs, indicative of a link farm or SEO spam. The document body, though truncated, also contains several of these URLs. The primary attack pattern appears to be directing users to external malicious sites through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9317

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=778.1&wehsa=1&pdf=778
    • http://aryservicos.com/index.php?article=1134.1&chxuv=1&pdf=1134
    • http://www.robinprime.com/index.php?article=2008.1&bedxv=1&pdf=2008
    • http://photo-file.ru/index.php?article=1022.1&wehsa=1&pdf=1022
    • http://ipestka.pl/index.php?article=683.1&qsxtx=1&pdf=683
    • http://photo-file.ru/index.php?article=604.1&wehsa=1&pdf=604
    • http://www.mantrabeautybar.ca/index.php?article=1708.1&rukbv=1&pdf=1708
    • http://websitedesignindelhi.co.in/index.php?article=4.1&uoohx=1&pdf=4
    • http://camus-sarl.fr/index.php?article=1231.2&fnxpz=2&pdf=1231
    • http://photo-file.ru/index.php?article=1716.1&wehsa=1&pdf=1716
    • http://photo-file.ru/index.php?article=1693.1&wehsa=1&pdf=1693
    • http://photo-file.ru/index.php?article=2205.1&wehsa=1&pdf=2205
    • http://wbus.nl/index.php?article=2485.7&exicf=7&pdf=2485
    • http://photo-file.ru/index.php?article=2106.1&wehsa=1&pdf=2106
    • http://kemerimalati.com/index.php?article=1416.3&rlrsj=3&pdf=1416
    • http://photo-file.ru/index.php?article=994.1&wehsa=1&pdf=994
    • http://www.authenticness.com/index.php?article=2317.1&aqdto=1&pdf=2317

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