Malicious PDF — malware analysis report

Static analysis result for SHA-256 6260a3cc52a7f1b4…

MALICIOUS

PDF

22.2 KB Created: 2020-04-19 02:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f5dee83c64d9cd22fc45bcdc5e5773c0 SHA-1: 6c5b66eba9d6d22e278673f770dd1771528372a5 SHA-256: 6260a3cc52a7f1b44a26affdb88f1aa9045752a0aeb2300ad74b827a439283bd
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the embedded URLs. No scripts were extracted, but the sheer volume of external links suggests a coordinated effort to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9884

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://timotheenicot.com/uploads/1/3/0/3/130379549/130379549.html#takipsilim+autotelic+free
    • http://mvchoreo.com/uploads/1/3/0/2/130270872/4878391.pdf
    • http://k9recreation.com/uploads/1/3/0/2/130272414/rirase_renuluwiritidoz.pdf
    • http://fusion-subpi-mandarin.com/uploads/1/3/1/3/131380433/terojuri.pdf
    • http://shirtydeals.com/uploads/1/3/0/9/130969545/fopabipudona.pdf
    • http://alienfm.org/uploads/1/3/0/6/130621213/ponek.pdf
    • http://anniesophie.com/uploads/1/3/0/8/130813395/240f47d788bd9.pdf
    • http://milwaukeegroup.net/uploads/1/3/0/6/130639629/surukut-jedugof-ridedazabitofef.pdf
    • http://eridani.co/uploads/1/3/0/5/130544746/fijovuxago_gamosapepezuf_mazopuwu.pdf
    • http://danaandraws.co.nz/uploads/1/3/0/5/130590244/purusoxono.pdf

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