Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5185df2c2bbd5b…

MALICIOUS

PDF

2.7 KB Created: 5329-01-01 Authoring application: 335
MD5: 619719565a12fd50307ab10fee6d8fae SHA-1: 5b6b8f449b858e78164843d26d69725a7b6b27d0 SHA-256: 9f5185df2c2bbd5bc284b88e8071be59fadf3f8391708e862e8143090755db05
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ClamAV detection 'Pdf.Exploit.Agent-36014' strongly suggests this JavaScript is malicious. The extracted artifact 'javascript_obj0013_001.js' is likely the payload. The script's purpose is to exploit a PDF vulnerability, leading to the execution of this embedded JavaScript, which is a common technique for delivering further malware.

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-36014 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36014
  • Suspicious extracted artifact medium 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.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0013_001.js
84affbde182bb17dbc01cfcff29b2d26943d125b0a7a8cf14950154f0425a32f
pdf-javascript-stream PDF /JS object 13 at offset 0x328 4775 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long hex-escaped blob(s).