Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc2c1fa59671e7e…

MALICIOUS

PDF

11.7 KB Created: 2015-07-15 16:27:15 +04:00 Authoring application: DOMPDF
MD5: 26478c95f6ee4e35bc8b1f84c2921853 SHA-1: eee3d48938465994e0febaff5ff6b42e20ef3048 SHA-256: 8cc2c1fa59671e7e899251026b44990373f6dbc1c098e8b17afceeb00705251d
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to various external websites. The heuristic 'PDF_SEO_LINK_FARM' indicates this is likely a link farm designed to manipulate search engine results or redirect users to potentially malicious content. The ML classifier also flagged the document as malicious. No scripts were extracted from this sample, and the document body text is heavily obfuscated, making it difficult to determine a more specific attack pattern beyond the link farm.

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=822.2&urwbo=2&pdf=822
    • http://www.thewastebutlers.com/index.php?article=1338.1&tkqal=1&pdf=1338
    • http://massiv-holz-moebel.de/index.php?article=382.1&onxqu=1&pdf=382
    • http://chavagnes.com/index.php?article=814.2&urwbo=2&pdf=814
    • http://synerte.eu/index.php?article=400.1&gwbut=1&pdf=400
    • http://chavagnes.com/index.php?article=617.2&urwbo=2&pdf=617
    • http://weterynarz-gdynia.pl/index.php?article=1780.2&axpfr=2&pdf=1780
    • http://hotrodderclassifieds.com/index.php?article=1730.1&hjjgr=1&pdf=1730
    • http://geekseals.com/index.php?article=2075.1&kcbpn=1&pdf=2075
    • http://chavagnes.com/index.php?article=555.2&urwbo=2&pdf=555
    • http://chavagnes.com/index.php?article=657.2&urwbo=2&pdf=657
    • http://chavagnes.com/index.php?article=119.2&urwbo=2&pdf=119
    • http://morlockfamily.pl/index.php?article=334.5&qpowq=5&pdf=334
    • http://chavagnes.com/index.php?article=206.2&urwbo=2&pdf=206
    • http://www.mantrabeautybar.ca/index.php?article=900.1&rukbv=1&pdf=900
    • http://chavagnes.com/index.php?article=2285.2&urwbo=2&pdf=2285
    • http://stmarkame.org/index.php?article=357.1&qsacf=1&pdf=357

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