Malicious PDF — malware analysis report

Static analysis result for SHA-256 83477ee7cc0cfd9a…

MALICIOUS

PDF

10.2 KB Created: 2009-05-06 12:30:52 Authoring application: vQWREwnDmHMjeb (via pUCkGxGMnwrPqIW)
MD5: 2c1d7330318d5d75f750b52192bd73ba SHA-1: 9c8c926d97c155d5af09b4bc250133be79b217ad SHA-256: 83477ee7cc0cfd9aa10b5b052a67fbf30f5affc7d26c4c93ab3055bf49b57848
110 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple engines, including ClamAV which identified it as Pdf.Exploit.Agent-35572. Static analysis revealed embedded JavaScript, indicating an attempt to exploit vulnerabilities within the PDF reader. The ML classifier also strongly indicated maliciousness. The embedded JavaScript is likely responsible for executing the exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-35572 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35572
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
081412704f72cc8dfe0bd413f3bfd3346d40b21744221d298ba0f49335332f7f
pdf-javascript-stream PDF /JS object 7 at offset 0x2D3 8971 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).