Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7ec40e5071444b…

MALICIOUS

PDF

12.9 KB Created: 2015-07-15 16:24:37 +04:00 Authoring application: DOMPDF
MD5: 349f2c6cdaceb102b29262137c55555e SHA-1: 026290dbcfb1147e7af335afa69e0812c0a98489 SHA-256: 4b7ec40e5071444b0c56229f48272765a0633d94cd80885d19753fa6c18ea7f3
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to various domains, indicative of a link farm. This technique is often used for SEO manipulation or to redirect users to malicious sites. The ML classifier also flagged this PDF as malicious with a high probability. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8856

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=1200.2&urwbo=2&pdf=1200
    • http://mudinside.it/index.php?article=598.2&ozinn=2&pdf=598
    • http://cierzodemontana.com/index.php?article=1587.7&vfjgt=7&pdf=1587
    • http://chavagnes.com/index.php?article=252.2&urwbo=2&pdf=252
    • http://www.mantrabeautybar.ca/index.php?article=2065.1&rukbv=1&pdf=2065
    • http://chavagnes.com/index.php?article=1917.2&urwbo=2&pdf=1917
    • http://bmwt.pt/index.php?article=2452.2&qvacx=2&pdf=2452
    • http://munchkinmoments.com.my/index.php?article=1227.1&itqlp=1&pdf=1227
    • http://brightworldinfotech.com/index.php?article=258.1&qfqoh=1&pdf=258
    • http://chavagnes.com/index.php?article=1164.2&urwbo=2&pdf=1164
    • http://chavagnes.com/index.php?article=1794.2&urwbo=2&pdf=1794
    • http://chavagnes.com/index.php?article=120.2&urwbo=2&pdf=120
    • http://anaprieto.com/index.php?article=1353.2&yhxyj=2&pdf=1353
    • http://chavagnes.com/index.php?article=245.2&urwbo=2&pdf=245
    • http://fotosalon-zoom.ru/index.php?article=260.4&sufyu=4&pdf=260
    • http://chavagnes.com/index.php?article=2497.2&urwbo=2&pdf=2497
    • http://www.kingdomfaithchurch.org/index.php?article=1259.1&fksac=1&pdf=1259

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