Malicious PDF — malware analysis report

Static analysis result for SHA-256 c550e98f27803ccd…

MALICIOUS

PDF

16.1 KB Created: 2007-12-35 21:45:26 Authoring application: Adobe
MD5: e34609129e6a70092d0208427ec8f2a8 SHA-1: 14014d16b35577d97be6d32e564096306b622ecd SHA-256: c550e98f27803ccd71c95e08deb23ed18a4850283bcd8f1645e3adfca2c7268c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the presence of JavaScript, including an eval() call, suggesting code execution. The ML classifier's high confidence score and the ClamAV detection of 'Pdf.Dropper.Agent-5343192-0' strongly support its classification as a dropper. No document body text was available for analysis, but the presence of JavaScript and the dropper heuristic point to the file's primary function of downloading and executing a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-5343192-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-5343192-0
  • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0032_000.js
271bac87a4785f3889244d604eae3cc2528b9b8cc673b604ec4cac353939ea48
pdf-javascript-stream PDF /JS object 32 at offset 0x3A8 1490853 bytes
javascript_obj0034_001.js
d797de515dac4f8369b71edf86d0fc9aa8fe1224d8f9d3f1eea8a19a1f23bfc7
pdf-javascript-stream PDF /JS object 34 at offset 0x3DA4 332 bytes
javascript_obj0036_002.js
351349db1f2c462951d107c63f395d2e3d546cbac252089bc55d7cd7501a396b
pdf-javascript-stream PDF /JS object 36 at offset 0x80 426 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).