Malicious PDF — malware analysis report

Static analysis result for SHA-256 b317db191060cd62…

MALICIOUS

PDF

2.5 KB Created: 2008-31-20 53:85:00 Authoring application: aaaaaaaa
MD5: e4472e4347c57010fce01972cb4d36e1 SHA-1: ec05456c56d453ba40438acf1e580165f88cabbb SHA-256: b317db191060cd624f20fc8239975b72a2fe91f6ff10f71f70aaff6f607bd24b
110 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it contains an exploit. Embedded JavaScript was detected, which is often used to download and execute further malicious payloads. The presence of obfuscation indicators in the extracted JavaScript further supports this. The ML classifier output of 0.999994 provides high confidence in its malicious nature.

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
  • 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_obj0013_001.js
75390b53ad3a4e8d8e1e98049b384682a334d901f38c6b36a954b514e512383e
pdf-javascript-stream PDF /JS object 13 at offset 0x328 4050 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 6 eval/decoder/string-building token(s).