Malicious PDF — malware analysis report

Static analysis result for SHA-256 8acb4d303c772205…

MALICIOUS

PDF

27.9 KB Created: 2020-04-27 02:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d636a5351b2ab0615a0da3aa1be91d18 SHA-1: 1d62b0653207d402f3c21fcf6aba4f6366e74310 SHA-256: 8acb4d303c7722054e694a026f0c87d9df02ea70be4908472b49c139dc790280
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains text related to 'Environmental management plan template nz' and the authoring application 'wkhtmltopdf', indicating a lure to disguise malicious links. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9215

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://deanareiboldt.com/uploads/1/3/0/4/130489066/130489066.html#environmental+management+plan+template+nz
    • http://fusionusa.org/uploads/1/3/0/9/130969704/4033644.pdf
    • http://yomhuledet4u.com/uploads/1/3/0/4/130488749/0d57b94dbf.pdf
    • http://planabooks.com/uploads/1/3/0/5/130550955/ramubojenumam-wigiko-pemamorodob.pdf
    • http://utahhomeforme.com/uploads/1/3/0/5/130588931/xagotikapis.pdf
    • http://aysenurguler.com/uploads/1/3/0/7/130776452/fafomemisosepo_labewim_rogogi.pdf
    • http://i-canfly.net/uploads/1/3/1/4/131452942/7353389.pdf
    • http://richard-m-powell.com/uploads/1/3/0/5/130539448/36e497f0d05d04d.pdf

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