Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba78e69a1ca825a…

MALICIOUS

PDF

7.7 KB Created: 2009-03-08 23:13:49 Authoring application: wdeVM (via s2Egb)
MD5: 342f5113fe3479904ce9f7dcf6215931 SHA-1: cb79e2ae481653cbe521184c94b6d5308a8f4947 SHA-256: 3ba78e69a1ca825ade4b926f4e0235205dde2b6dbe91f8e74996e98d4f22823a
88 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an eval() call (PDF_EVAL) and a high ML classifier score (ML_NYX_PDF_MALICIOUS) strongly suggest malicious intent. The extracted artifact 'javascript_obj0007_000.js' is likely the payload, designed to be executed by the PDF, potentially leading to further malicious activity.

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
f296604f89bae66d85fe0324690561c6e8a3fd89c13644a9db3882b285470e96
pdf-javascript-stream PDF /JS object 7 at offset 0x23C 6496 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).