Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf5141074e84c8b…

MALICIOUS

PDF

12.9 KB Created: 2015-07-15 14:40:41 +04:00 Authoring application: DOMPDF
MD5: 43728f1f4748da316887aa130cb56065 SHA-1: ef174e677e0281c16fe792f20f65ecbad3dc0ad5 SHA-256: 6bf5141074e84c8b213ff2ee550e564827bd9a35cc722198eab93b56f5d5dfa2
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various external websites. The ML_NYX_PDF_MALICIOUS classifier also flagged the document. While no scripts were extracted, the sheer volume of outbound links suggests a malicious intent, possibly to redirect users to phishing sites or to manipulate search engine rankings for malicious purposes. The document body contains fragmented text and URLs, reinforcing the link farm finding.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8838

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=1561.1&wehsa=1&pdf=1561
    • http://ve-klubben.dk/index.php?article=2372.1&zcpvv=1&pdf=2372
    • http://zomodiet.com/index.php?article=642.1&tqubb=1&pdf=642
    • http://photo-file.ru/index.php?article=2173.1&wehsa=1&pdf=2173
    • http://madejalook.com/index.php?article=2494.1&ynlkg=1&pdf=2494
    • http://photo-file.ru/index.php?article=2363.1&wehsa=1&pdf=2363
    • http://alears.lv/index.php?article=878.2&cqwcy=2&pdf=878
    • http://hsaig.com/index.php?article=1307.1&gpfes=1&pdf=1307
    • http://morlockfamily.pl/index.php?article=1706.5&qpowq=5&pdf=1706
    • http://photo-file.ru/index.php?article=2359.1&wehsa=1&pdf=2359
    • http://photo-file.ru/index.php?article=1821.1&wehsa=1&pdf=1821
    • http://photo-file.ru/index.php?article=288.1&wehsa=1&pdf=288
    • http://www.mantrabeautybar.ca/index.php?article=1706.1&rukbv=1&pdf=1706
    • http://photo-file.ru/index.php?article=1220.1&wehsa=1&pdf=1220
    • http://domedesigner.com/index.php?article=1130.1&urgni=1&pdf=1130
    • http://photo-file.ru/index.php?article=153.1&wehsa=1&pdf=153
    • http://www.amenagementboislyon.com/index.php?article=1563.1&jnfas=1&pdf=1563

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