Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb7bdbf126ba514…

MALICIOUS

PDF

11.6 KB Created: 2015-07-15 16:25:26 +04:00 Authoring application: DOMPDF
MD5: 579f7bb508d806dbc4c7ac62fd72525d SHA-1: d135c24c08027a76e37a7c743795d0655db944a3 SHA-256: dfb7bdbf126ba514cfb469dd70119f9166153ab6c2f8693bf850e8c999e484b6
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file contains a large number of embedded URLs, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs are likely used to redirect users to malicious websites, potentially for SEO spam or to distribute further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9351

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=1866.2&urwbo=2&pdf=1866
    • http://kameraturva.net/index.php?article=66.4&ghbga=4&pdf=66
    • http://www.thewastebutlers.com/index.php?article=1938.1&tkqal=1&pdf=1938
    • http://chavagnes.com/index.php?article=370.2&urwbo=2&pdf=370
    • http://websitedesignindelhi.co.in/index.php?article=1420.1&uoohx=1&pdf=1420
    • http://chavagnes.com/index.php?article=1581.2&urwbo=2&pdf=1581
    • http://radiocepea.com/index.php?article=1314.1&pvbba=1&pdf=1314
    • http://hotrodderclassifieds.com/index.php?article=521.1&hjjgr=1&pdf=521
    • http://razan.com.ua/index.php?article=838.1&vafyr=1&pdf=838
    • http://chavagnes.com/index.php?article=816.2&urwbo=2&pdf=816
    • http://chavagnes.com/index.php?article=1249.2&urwbo=2&pdf=1249
    • http://chavagnes.com/index.php?article=829.2&urwbo=2&pdf=829
    • http://www.mantrabeautybar.ca/index.php?article=210.1&rukbv=1&pdf=210
    • http://chavagnes.com/index.php?article=1216.2&urwbo=2&pdf=1216
    • http://trans-cultures.eu/index.php?article=235.1&asedt=1&pdf=235
    • http://chavagnes.com/index.php?article=246.2&urwbo=2&pdf=246
    • http://phillipsandcoinc.com/index.php?article=803.1&sxlyu=1&pdf=803

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