Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6cea99af5b5e43…

MALICIOUS

PDF

62.8 KB Created: 2009-06-26 16:25:57 +08:00 Authoring application: Acrobat PDFMaker 7.0 for Word (via Acrobat Distiller 7.0 (Windows))
MD5: c8d9334b401ef4212bf15a132eaf1f8f SHA-1: ed996fd716d26a5285b1b26b64d1281692b79a9e SHA-256: cd6cea99af5b5e43527aa21fb4d0e5a46d86c07b444c5612f6c7e0c39f01483e
78 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV with the signature Pdf.Exploit.Agent-20824. Static analysis revealed embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics, and an artifact named 'javascript_obj0048_000.js'. This suggests the document is designed to execute malicious code, likely to download and run a secondary payload. The presence of JavaScript actions and embedded JS streams points towards an exploit attempt.

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-20824 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-20824
  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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/pdf/1.3/
    • http://ns.adobe.com/pdfx/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0048_000.js
115bc9e664e7313809b4fa42d6d614daab6059afdb04239821322c24273dc17c		 pdf-javascript-stream PDF /JS object 48 at offset 0x50B 3668 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).

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