Malicious PDF — malware analysis report

Static analysis result for SHA-256 5477f592f40547ef…

MALICIOUS

PDF

12.3 KB Created: 2015-07-15 14:38:39 +04:00 Authoring application: DOMPDF
MD5: 54daa8bd44dedce1d2d4d994a76e4d61 SHA-1: 42648f42082525689d12473e03f2df9031bc8674 SHA-256: 5477f592f40547ef7d0d481202ca39859d1da6045cae766a384b802fa5630fd6
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 and contains a large number of embedded URLs, indicating a link farm. The primary heuristic firing, PDF_SEO_LINK_FARM, confirms the presence of numerous external links. The document body also contains many of these URLs, suggesting the file's purpose is to direct users to these external sites, likely for SEO spam or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8883

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=2068.1&wehsa=1&pdf=2068
    • http://ehsaasmhs.org/index.php?article=1842.1&qcugi=1&pdf=1842
    • http://brightworldinfotech.com/index.php?article=1486.1&qfqoh=1&pdf=1486
    • http://photo-file.ru/index.php?article=2218.1&wehsa=1&pdf=2218
    • http://www.pieuvre-electrique-toulousaine.fr/index.php?article=2289.1&otafi=1&pdf=2289
    • http://photo-file.ru/index.php?article=2316.1&wehsa=1&pdf=2316
    • http://www.ecoservice.co/index.php?article=1821.1&egezd=1&pdf=1821
    • http://fotosalon-zoom.ru/index.php?article=1832.4&sufyu=4&pdf=1832
    • http://massiv-holz-moebel.de/index.php?article=787.1&onxqu=1&pdf=787
    • http://photo-file.ru/index.php?article=1551.1&wehsa=1&pdf=1551
    • http://photo-file.ru/index.php?article=1494.1&wehsa=1&pdf=1494
    • http://photo-file.ru/index.php?article=2094.1&wehsa=1&pdf=2094
    • http://www.mantrabeautybar.ca/index.php?article=1807.1&rukbv=1&pdf=1807
    • http://photo-file.ru/index.php?article=2468.1&wehsa=1&pdf=2468
    • http://www.wslab.co/index.php?article=1018.1&fvtfv=1&pdf=1018
    • http://photo-file.ru/index.php?article=452.1&wehsa=1&pdf=452
    • http://topservices.co.il/index.php?article=1697.1&xujqf=1&pdf=1697

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