Malicious PDF — malware analysis report

Static analysis result for SHA-256 512b8f97d027be5e…

MALICIOUS

PDF

11.7 KB Created: 2015-07-15 16:27:00 +04:00 Authoring application: DOMPDF
MD5: 4d121db5bb7e25b2435a50a6e4929615 SHA-1: 835da4233b6a6a4178650191d7ba7c2cc67ed0dd SHA-256: 512b8f97d027be5e8ec1db9976225169d11c62906f1218287249924bd8944859
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of embedded URLs, forming a link farm. The primary attack pattern appears to be directing users to external sites, potentially for SEO manipulation or to serve malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8959

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=2116.2&urwbo=2&pdf=2116
    • http://trans-cultures.eu/index.php?article=1231.1&asedt=1&pdf=1231
    • http://www.kingdomfaithchurch.org/index.php?article=2489.1&fksac=1&pdf=2489
    • http://chavagnes.com/index.php?article=2410.2&urwbo=2&pdf=2410
    • http://www.masajesmexicali.com/index.php?article=754.1&pjtcs=1&pdf=754
    • http://chavagnes.com/index.php?article=775.2&urwbo=2&pdf=775
    • http://smu12.com/index.php?article=980.4&ezwhk=4&pdf=980
    • http://aryservicos.com/index.php?article=637.1&chxuv=1&pdf=637
    • http://quraniarbi.com/index.php?article=1796.2&sbfeb=2&pdf=1796
    • http://chavagnes.com/index.php?article=1694.2&urwbo=2&pdf=1694
    • http://chavagnes.com/index.php?article=1727.2&urwbo=2&pdf=1727
    • http://chavagnes.com/index.php?article=851.2&urwbo=2&pdf=851
    • http://www.mantrabeautybar.ca/index.php?article=284.1&rukbv=1&pdf=284
    • http://chavagnes.com/index.php?article=1326.2&urwbo=2&pdf=1326
    • http://top-rice-cooker.com/index.php?article=657.1&ratfe=1&pdf=657
    • http://chavagnes.com/index.php?article=1581.2&urwbo=2&pdf=1581
    • http://stmarkame.org/index.php?article=1494.1&qsacf=1&pdf=1494

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