Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2472d30c8372f38…

MALICIOUS

PDF

17.9 KB Created: 2012-06-07 10:46:28 +01:00 Authoring application: iTextSharp’ 5.5.10 ©2000-2016 iText Group NV (AGPL-version)
MD5: 7f26da2d0d725825fb4c7926d74a5fba SHA-1: d81599908b4c5aa53b459ce1b5d4e8d7abdc6cda SHA-256: d2472d30c8372f3817a3e496743a700096016973b39f39b72bf5cc1b1a2a8a3a
114 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a dropper. Embedded JavaScript streams were detected, indicating an attempt to execute code. The presence of embedded files, such as 'legit.docx', further suggests a multi-stage infection process. The primary function appears to be the delivery of additional malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-7307531-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7307531-0
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
legit.docx
32ed7152b6fddd77225f7519b623e5dffecf268353d6c3492d91375bff536fd9		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x85 13266 bytes
javascript_obj0012_000.js
dfe131a9d612d858fd2386745dc33aa0ce081db21594b6273fc1407e0c2098cf		 pdf-javascript-stream PDF /JS object 12 at offset 0x44FE 50 bytes
javascript_obj0003_001.js
a7cae16436118a22bd1e98cf23ccadb5bd0e952e96b60e6bf0e1ab6f05b52bd3		 pdf-javascript-stream PDF /JS object 3 at offset 0x4105 101 bytes

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