Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10d69d66ba22ac3…

MALICIOUS

PDF

192.6 KB Created: 2023-04-20 16:15:53 -01:00 Authoring application: ReportLab PDF Library - www.reportlab.com
MD5: f09c96b3c6bc4745c8fade1a8a47591c SHA-1: 68ba06a44bef88885667dc4cf026b02b61e887ee SHA-256: e10d69d66ba22ac3e14100bce8a324db59d15fd1c2a7ce78316d0e3681d3c45c
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The PDF contains an embedded link that directly points to a ZIP archive, identified as a malicious payload. The PDF also utilizes parser evasion techniques and embedded JavaScript, indicating an attempt to conceal malicious activity and potentially execute further stages. The ML classifier strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9087

Heuristics 5

  • PDF link points directly to executable/archive payload critical PDF_DIRECT_PAYLOAD_LINK
    PDF contains a clickable HTTP(S) URI whose path ends in an executable, script, shortcut, disk image, or archive extension. Documents can legitimately link to installers, so this is a high-risk delivery indicator rather than a standalone exploit fingerprint.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85
    ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
  • 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 https://biznessfarm.buzz/doc_12QICZ_85.zip
    • http://www.reportlab.com
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/

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