Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a98929f29a8bd6c…

MALICIOUS

PDF

12.0 KB Created: 2015-07-16 23:45:59 +04:00 Authoring application: DOMPDF
MD5: ca9ecdde7885cbf17f193e5abcecadf8 SHA-1: 535f0a1c5bc05076e4b5589ead8910ab557bf120 SHA-256: 2a98929f29a8bd6c6984859ebf1ab87ae0c95d4d570620957b1ef837c15f08ce
90 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier and contains a large number of embedded URLs, indicating a link farm. The primary heuristic firing, PDF_SEO_LINK_FARM, confirms this behavior. The document body itself is heavily obfuscated and contains many of these URLs, suggesting the main purpose is to redirect users to external sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9242

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=1020.3&pvfgd=3&pdf=1020
    • http://geekseals.com/index.php?article=505.1&kcbpn=1&pdf=505
    • http://maderasdelcarmen.com/index.php?article=1518.3&wvpuz=3&pdf=1518
    • http://chavagnes.com/index.php?article=1997.3&pvfgd=3&pdf=1997
    • http://www.amenagementboislyon.com/index.php?article=2344.1&jnfas=1&pdf=2344
    • http://chavagnes.com/index.php?article=1907.3&pvfgd=3&pdf=1907
    • http://regionori.ru/index.php?article=400.2&ynjyk=2&pdf=400
    • http://archerwealth.com.au/index.php?article=1070.1&ldzws=1&pdf=1070
    • http://brightworldinfotech.com/index.php?article=27.2&qhahk=2&pdf=27
    • http://chavagnes.com/index.php?article=2076.3&pvfgd=3&pdf=2076
    • http://chavagnes.com/index.php?article=1198.3&pvfgd=3&pdf=1198
    • http://chavagnes.com/index.php?article=1733.3&pvfgd=3&pdf=1733
    • http://www.mantrabeautybar.ca/index.php?article=1502.2&chffj=2&pdf=1502
    • http://chavagnes.com/index.php?article=1105.3&pvfgd=3&pdf=1105
    • http://smu12.com/index.php?article=638.5&gkcqr=5&pdf=638
    • http://chavagnes.com/index.php?article=1492.3&pvfgd=3&pdf=1492
    • http://acast.ru/index.php?article=605.6&nuvqd=6&pdf=605

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