Malicious PDF — malware analysis report

Static analysis result for SHA-256 b097f504707b0079…

MALICIOUS

PDF

11.0 KB
MD5: 0791cf6fc1db1babbe057d0bf7be6049 SHA-1: 3cb2a6fe5801001ab363db5722e0a49d09ec4add SHA-256: b097f504707b0079bcb371331a4e1f4039b4cd15e44dff0b09d88fb026183e18
148 Risk Score

Malware Insights

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

This PDF was flagged by multiple high-severity heuristics and a machine learning classifier as malicious. It contains embedded JavaScript, which is often used to download and execute additional malicious content. The ClamAV detection name 'Pdf.Dropper.Agent-7293793-0' further supports its role as a dropper. The presence of JavaScript actions and streams, along with the unescape function, indicates an attempt to obfuscate malicious code execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-7293793-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7293793-0
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • 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
1e2c40029981d31748839c76dcc978592d01b7262f3d7d418510d24c884ac58a
pdf-javascript-stream PDF /JS object 7 at offset 0x233 48956 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 275 eval/decoder/string-building token(s).