Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb8af79bfae64c28…

MALICIOUS

PDF

2.7 KB Created: 8174-01-01 Authoring application: 1788
MD5: e5277ad9a73ca88686d0005f2f9c7fa3 SHA-1: e093798731dab465a415d84e118cba06e9eaed62 SHA-256: fb8af79bfae64c288b186b91b222b987596c7c97eb31287cd2ba7c3b5bc98e7d
128 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV with the signature Pdf.Exploit.Agent-36014. Static analysis revealed embedded JavaScript, indicating an attempt to exploit a vulnerability within the PDF reader. The JavaScript is obfuscated, but its presence strongly suggests the execution of a malicious payload. The ML classifier's high confidence score further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-36014 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36014
  • Suspicious extracted artifact medium 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.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0013_001.js
bc363c0139115f4e36c7a09bf417ffeec21c9900e785eeb4705608b7242cbd4d
pdf-javascript-stream PDF /JS object 13 at offset 0x328 4765 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long hex-escaped blob(s).