Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03c7cf2cbe06131…

MALICIOUS

PDF

9.4 KB Created: 2010-06-05 21:07:21 Authoring application: ZjOxznzW5f4 (via Drc1Ad8)
MD5: fe44acd6c1e83daba87fdaab1802c7a3 SHA-1: 4ebd04a48860f344c70c30a8d7047937a08d477f SHA-256: e03c7cf2cbe06131538a4ba3835921f6da4bd851c388e03ada8978e46a90854f
88 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains embedded JavaScript, which is flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier strongly indicates maliciousness. The JavaScript stream, named javascript_obj0007_000.js, is likely responsible for executing the malicious payload. The obfuscated nature of the JavaScript and the lack of readable document body text prevent a more specific family attribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (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
bc4f8f2f62c1bae8e9704f729504e1be33052fa3d684a15394e87da7da522d39
pdf-javascript-stream PDF /JS object 7 at offset 0x238 8225 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).