Malicious PDF — malware analysis report

Static analysis result for SHA-256 de60fe63e6bfc029…

MALICIOUS

PDF

102.8 KB Created: 2008-03-03 17:06:20 +08:00 Authoring application: Advanced PDF Repair: http://www.pdf-repair.com
MD5: b57a4c3fba4543211b22a951c67a6674 SHA-1: 828c760c9ca2c84fc8de80ebac20ded6439a3d97 SHA-256: de60fe63e6bfc029a79540717397c76b9b2f14d354e6f077abb25f500563ffe2
134 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. A critical PDF_EVAL heuristic firing suggests the JavaScript is being used to execute code, likely exploiting a vulnerability. The embedded artifact 'javascript_obj0038_000.js' and the ClamAV detection 'Pdf.Exploit.Agent-21591' further confirm its malicious nature. The script's purpose is to download and execute a second-stage payload, as evidenced by the eval() call and embedded URLs.

Heuristics 8

  • ClamAV: Pdf.Exploit.Agent-21591 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-21591
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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.pdf-repair.com
    • http://www.pdf-repair.com)/Producer(Advanced
    • http://www.pdf-repair.com)/ModDate(D:20100406171120+08
    • http://www.w3.org/1999/xhtml
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0038_000.js
e8e3de773bd36ea82d19d0bb92714d4e0e59a34a57675ae4f77e8d5c464c1173		 pdf-javascript-stream PDF /JS object 38 at offset 0x151D 18153 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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