Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dfd04aa237d397e…

MALICIOUS

PDF

12.7 KB Created: 2015-07-15 16:23:52 +04:00 Authoring application: DOMPDF
MD5: 3bf0f9390641071d229d8d7811510b91 SHA-1: 1ea7386aae092f2a59ba9a8f281eab91685e206f SHA-256: 4dfd04aa237d397e29b8e1d7d10c1e8e1c66bab2cc4f3ffe77eaf333cd22bae4
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier and contains a significant number of embedded external links. This suggests a link farm or SEO abuse attack pattern. The embedded links are likely used to direct users to malicious websites or to improve the search engine ranking of those sites. No scripts were extracted, and the document body contained mostly obfuscated or binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8835

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=2177.2&urwbo=2&pdf=2177
    • http://www.mantrabeautybar.ca/index.php?article=395.1&rukbv=1&pdf=395
    • http://vioval.eu/index.php?article=1880.1&irrir=1&pdf=1880
    • http://chavagnes.com/index.php?article=327.2&urwbo=2&pdf=327
    • http://geekseals.com/index.php?article=1309.1&kcbpn=1&pdf=1309
    • http://chavagnes.com/index.php?article=1025.2&urwbo=2&pdf=1025
    • http://heathervincentlandscapes.com.au/index.php?article=1490.1&bsylx=1&pdf=1490
    • http://websitedesignindelhi.co.in/index.php?article=2284.1&uoohx=1&pdf=2284
    • http://razan.com.ua/index.php?article=2396.1&vafyr=1&pdf=2396
    • http://chavagnes.com/index.php?article=250.2&urwbo=2&pdf=250
    • http://chavagnes.com/index.php?article=607.2&urwbo=2&pdf=607
    • http://chavagnes.com/index.php?article=2473.2&urwbo=2&pdf=2473
    • http://www.authenticness.com/index.php?article=125.1&aqdto=1&pdf=125
    • http://chavagnes.com/index.php?article=1441.2&urwbo=2&pdf=1441
    • http://regionori.ru/index.php?article=1175.1&lcnlt=1&pdf=1175
    • http://chavagnes.com/index.php?article=995.2&urwbo=2&pdf=995
    • http://www.pieuvre-electrique-toulousaine.fr/index.php?article=2078.1&otafi=1&pdf=2078

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