Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd7d63133173d31…

MALICIOUS

PDF

44.3 KB Created: 2019-04-11 12:43:51 +03:00 Authoring application: Adobe InDesign CS6 (Macintosh) (via Acrobat Distiller 10.1.12 (Macintosh))
MD5: dffe89a076a74eb4975e7df14208f84c SHA-1: 25a7d06dbfda30c3ed3a3efe65a43bb38bb78dd6 SHA-256: ebd7d63133173d314c712e09786ea3df8f263ad3228ae2c7fcdcb61c62ed91ce
90 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains a large number of external links, indicating a potential SEO poisoning or phishing attack. The links point to various PDF documents hosted on gorillawalker.com, suggesting a coordinated effort to distribute content or lure users. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8859

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.
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    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/