Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e174ed45e516d82…

MALICIOUS

PDF

4.5 KB Created: 2015-06-03 16:40:39 +03:00 Authoring application: DOMPDF
MD5: 23e500b04f2e3cc2040115dfbd812591 SHA-1: aef01124ec0275b1b9ed9630eb97aa7eb7b9699f SHA-256: 9e174ed45e516d8210d5b741717199c5246aab1d4a1f2dafd494c5ea9c54a1c8
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs, many of which are dynamically generated and appear to be part of a link farm designed to manipulate search engine results. The document body, while containing seemingly innocuous text about investment options, also embeds these URLs, suggesting a social engineering tactic to trick users into clicking them. The primary heuristic firing indicates a 'PDF_SEO_LINK_FARM' which strongly suggests the document's purpose is to drive traffic to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5320

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://www.nibl.co.nz/index.php?2015/decision.pdf&angzv=1&aspx=2257
    • http://phcccolorado.org/index.php?2015/arabtera.pdf&effpp=1&aspx=2083
    • http://www.kbb-gesellschaft.de/index.php?2015/ergoarena.pdf&urggv=1&aspx=1808
    • http://www.kbb-gesellschaft.de/index.php?2015/ergoarena.pdf&urggv=1&aspx=1419
    • http://www.nibl.co.nz/index.php?2015/decision.pdf&angzv=1&aspx=1400
    • http://dyrlaegecentret.dk/index.php?2015/typestitch.pdf&hjhle=1&aspx=sitemap