Malicious PDF — malware analysis report

Static analysis result for SHA-256 382baadae3025dfd…

MALICIOUS

PDF

6.5 KB Created: 2009-05-06 20:45:24 +08:00 Authoring application: DocuCom PDF Core Library
MD5: 8968e5c2fd9b61b2d18f311b6435cc40 SHA-1: 313ae8b14c59f805ffc694c9615e1fb2e1cca294 SHA-256: 382baadae3025dfdda4eaf6493e4d3e1b2280205a69cf122174f4757dcb219d2
136 Risk Score

Malware Insights

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

The critical ClamAV heuristic firings indicate this PDF file is recognized as malicious, specifically 'Pdf.Exploit.Agent-35646'. The presence of embedded JavaScript actions and streams, along with the PDF structure, strongly suggests an exploit targeting PDF vulnerabilities. The JavaScript is likely designed to download and execute a secondary payload, a common technique for initial access.

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-35646 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35646
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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 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://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/pdfx/1.3/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0004_000.js
513e002ab01764cc34b29b28611c6c863a94d15ad1e3f04a31cdc75b8c584f3a		 pdf-javascript-stream PDF /JS object 4 at offset 0x891 14600 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35646
Obfuscation or payload: unlikely

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