Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57125ed6256f13b…

MALICIOUS

PDF

12.1 KB Created: 2015-07-15 16:25:34 +04:00 Authoring application: DOMPDF
MD5: cbe2578572098f55fd6ddede546da8e2 SHA-1: ee47f556d0438bcf1a0d30c4853a8b262176da32 SHA-256: d57125ed6256f13b75ff11378214d99983196db7302f74f050ac8941940211a2
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier and contains a significant number of embedded URLs, indicating a link farm or redirection scheme. The heuristic 'PDF_SEO_LINK_FARM' specifically calls out the mass external PDF link farm. While no scripts were extracted, the sheer volume and nature of the URLs suggest the primary intent is to lure users to external, potentially malicious, sites.

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://chavagnes.com/index.php?article=1423.2&urwbo=2&pdf=1423
    • http://www.masajesmexicali.com/index.php?article=1028.1&pjtcs=1&pdf=1028
    • http://dhyansuman.com/index.php?article=1360.8&xvanh=8&pdf=1360
    • http://chavagnes.com/index.php?article=1654.2&urwbo=2&pdf=1654
    • http://vioval.eu/index.php?article=2125.1&irrir=1&pdf=2125
    • http://chavagnes.com/index.php?article=1033.2&urwbo=2&pdf=1033
    • http://lektoring.eu/index.php?article=275.1&zsaop=1&pdf=275
    • http://zomodiet.com/index.php?article=2450.1&tqubb=1&pdf=2450
    • http://www.amenagementboislyon.com/index.php?article=2375.1&jnfas=1&pdf=2375
    • http://chavagnes.com/index.php?article=237.2&urwbo=2&pdf=237
    • http://chavagnes.com/index.php?article=229.2&urwbo=2&pdf=229
    • http://chavagnes.com/index.php?article=2297.2&urwbo=2&pdf=2297
    • http://weterynarz-gdynia.pl/index.php?article=533.2&axpfr=2&pdf=533
    • http://chavagnes.com/index.php?article=176.2&urwbo=2&pdf=176
    • http://www.mantrabeautybar.ca/index.php?article=648.1&rukbv=1&pdf=648
    • http://chavagnes.com/index.php?article=548.2&urwbo=2&pdf=548
    • http://pleasereadbible.com/index.php?article=759.1&ofdkh=1&pdf=759

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