Malicious PDF — malware analysis report

Static analysis result for SHA-256 e423bbf3bd9fb695…

MALICIOUS

PDF

11.4 KB Created: 2015-07-16 23:47:54 +04:00 Authoring application: DOMPDF
MD5: f161f3555df8d9f17dfac3bd391cdf4f SHA-1: 946ea0065803ecbaf9fb9b350749da94602b9867 SHA-256: e423bbf3bd9fb695531f47302cdb6b39c57e6c4e41992157c3278c479347c037
90 Risk Score

Malware Insights

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

The PDF contains a large number of external links, characteristic of a link farm designed to manipulate search engine results or redirect users to malicious sites. The ML classifier also flagged this PDF as malicious. No scripts were extracted, and the document body contained mostly binary data and URLs, providing limited insight into a specific lure. The primary attack pattern observed is the distribution of a link farm within a PDF document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9048

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=1702.3&pvfgd=3&pdf=1702
    • http://karolek.com.pl/index.php?article=24.1&fwvio=1&pdf=24
    • http://radiocepea.com/index.php?article=2169.2&kccck=2&pdf=2169
    • http://chavagnes.com/index.php?article=953.3&pvfgd=3&pdf=953
    • http://www.mantrabeautybar.ca/index.php?article=959.2&chffj=2&pdf=959
    • http://chavagnes.com/index.php?article=1588.3&pvfgd=3&pdf=1588
    • http://centrodepsicoterapiaintegral.com.mx/index.php?article=2038.1&cpuqr=1&pdf=2038
    • http://vioval.eu/index.php?article=2384.2&obktx=2&pdf=2384
    • http://zamca.ro/index.php?article=1011.1&jxoor=1&pdf=1011
    • http://chavagnes.com/index.php?article=1767.3&pvfgd=3&pdf=1767
    • http://chavagnes.com/index.php?article=2036.3&pvfgd=3&pdf=2036
    • http://chavagnes.com/index.php?article=2395.3&pvfgd=3&pdf=2395
    • http://stmarkame.org/index.php?article=2249.2&uelqq=2&pdf=2249
    • http://chavagnes.com/index.php?article=560.3&pvfgd=3&pdf=560
    • http://xserve-online.de/index.php?article=553.2&tlqva=2&pdf=553
    • http://chavagnes.com/index.php?article=2248.3&pvfgd=3&pdf=2248
    • http://les-zephyrs.com/index.php?article=1419.2&ylevy=2&pdf=1419

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