Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a84b9b8c6ff8e1b…

MALICIOUS

PDF

26.9 KB Created: 2020-04-08 02:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 326c60ced56c1050477dd898064d0d7b SHA-1: 89d9cc9e528f36868ceb521f482da2897fc916b4 SHA-256: 3a84b9b8c6ff8e1b06f1307e7e5ead62f805574835c77195fe1c2669cb5b211d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links to various domains, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to URLs that are also present in the extracted URL list, reinforcing the link farm hypothesis. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://khadijaalmousa.com/uploads/1/3/0/8/130873912/130873912.html#reverse+image+search+porn
    • http://humblehumanmovement.com/uploads/1/3/0/6/130621048/7b0208e77.pdf
    • http://itsherimpact.com/uploads/1/3/1/4/131453399/7643894988e7d94.pdf
    • http://citypluse.com/uploads/1/3/0/4/130489530/7944089.pdf
    • http://aewestart.com/uploads/1/3/0/6/130603971/gekow.pdf
    • http://robertstravelservice.com/uploads/1/3/0/6/130604795/1309779.pdf
    • http://thyfreesoul.com/uploads/1/3/0/7/130776291/lalavimumuwama_folinogubav_jenewevaxo.pdf