Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b85a3e03a091d5…

MALICIOUS

PDF

12.5 KB Created: 2015-07-15 14:40:26 +04:00 Authoring application: DOMPDF
MD5: 542b9f7bb72defef282a1f1d0c31b6d1 SHA-1: fd7337e453201e9f5bb5676e9a29e12456b41e60 SHA-256: d7b85a3e03a091d57c15823e7412340636d44d6246f228769f94c3c89f89d74e
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. Static analysis revealed a significant number of embedded URLs, forming a link farm. The primary heuristic, PDF_SEO_LINK_FARM, indicates that the document's purpose is to direct users to numerous external websites, likely for malicious SEO or to serve as a distribution point for further threats. No scripts were extracted from this sample.

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://photo-file.ru/index.php?article=1525.1&wehsa=1&pdf=1525
    • http://munchkinmoments.com.my/index.php?article=1969.1&itqlp=1&pdf=1969
    • http://kredite-fuer-arbeitslose.net/index.php?article=961.1&jhins=1&pdf=961
    • http://photo-file.ru/index.php?article=1427.1&wehsa=1&pdf=1427
    • http://casarosso.com.tr/index.php?article=1291.1&gdggi=1&pdf=1291
    • http://photo-file.ru/index.php?article=225.1&wehsa=1&pdf=225
    • http://marjangecevic.com/index.php?article=963.1&vgslo=1&pdf=963
    • http://www.mantrabeautybar.ca/index.php?article=2197.1&rukbv=1&pdf=2197
    • http://epremier.ro/index.php?article=1350.1&ivdfx=1&pdf=1350
    • http://photo-file.ru/index.php?article=2126.1&wehsa=1&pdf=2126
    • http://photo-file.ru/index.php?article=1839.1&wehsa=1&pdf=1839
    • http://photo-file.ru/index.php?article=1899.1&wehsa=1&pdf=1899
    • http://www.dikiliermanoto.com/index.php?article=2474.1&snsfa=1&pdf=2474
    • http://photo-file.ru/index.php?article=2039.1&wehsa=1&pdf=2039
    • http://unibindsport.no/index.php?article=352.1&ufueq=1&pdf=352
    • http://photo-file.ru/index.php?article=1876.1&wehsa=1&pdf=1876
    • http://ve-klubben.dk/index.php?article=1563.1&zcpvv=1&pdf=1563

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