Malicious PDF — malware analysis report

Static analysis result for SHA-256 83b6d0c12b086ff0…

MALICIOUS

PDF

12.5 KB Created: 2015-07-15 16:25:00 +04:00 Authoring application: DOMPDF
MD5: a3c6da99fc793f9eea5bd65d0a6a38e5 SHA-1: deac836c717e1889ff53ce2f826cb311a5856b17 SHA-256: 83b6d0c12b086ff0fe101debbcc241d087a4c9d0fbc557297e307f3dc48af789
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 various domains, indicating a link farm. This is supported by the PDF_SEO_LINK_FARM heuristic firing. The ML classifier also flagged the PDF as malicious. The document body contains garbled text and some URLs, but the primary malicious intent appears to be directing users to external sites.

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://chavagnes.com/index.php?article=766.2&urwbo=2&pdf=766
    • http://TomOn.tv/index.php?article=1364.1&oeyju=1&pdf=1364
    • http://massiv-holz-moebel.de/index.php?article=249.1&onxqu=1&pdf=249
    • http://chavagnes.com/index.php?article=470.2&urwbo=2&pdf=470
    • http://londonfilmandcomiccon.net/index.php?article=1107.2&ybtwx=2&pdf=1107
    • http://chavagnes.com/index.php?article=1459.2&urwbo=2&pdf=1459
    • http://www.lifedreams.es/index.php?article=1955.1&isbrk=1&pdf=1955
    • http://acast.ru/index.php?article=1638.5&zueuf=5&pdf=1638
    • http://dhyansuman.com/index.php?article=1276.8&xvanh=8&pdf=1276
    • http://chavagnes.com/index.php?article=2277.2&urwbo=2&pdf=2277
    • http://chavagnes.com/index.php?article=42.2&urwbo=2&pdf=42
    • http://chavagnes.com/index.php?article=2072.2&urwbo=2&pdf=2072
    • http://www.mantrabeautybar.ca/index.php?article=2146.1&rukbv=1&pdf=2146
    • http://chavagnes.com/index.php?article=24.2&urwbo=2&pdf=24
    • http://www.fabulaeventos.com.br/index.php?article=3.1&ipwdu=1&pdf=3
    • http://chavagnes.com/index.php?article=2075.2&urwbo=2&pdf=2075
    • http://www.cauzionealbogestoriambientali.it/index.php?article=741.1&urrpv=1&pdf=741

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