Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e581c448b754d9…

MALICIOUS

PDF

2.7 KB Created: 3734-01-01 Authoring application: 872
MD5: 1b7b25753f26bbccea5281f56cd3f5f1 SHA-1: 9e5e214235896eba37fdddc50735110bccd8087b SHA-256: b1e581c448b754d9e7d76dd244a7e122b8cc25f4cf3fa8e52c4bfdd6e16be85d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detection as 'Pdf.Exploit.Agent-36014' strongly suggests a known exploit. The embedded JavaScript is obfuscated, and a suspicious extracted file 'javascript_obj0013_001.js' was noted, further supporting the exploit attempt. The exact nature of the exploit is unclear due to obfuscation, but it likely aims to compromise the user through the PDF viewer.

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
e64de98581ba187b42dc3f53bfe1d11de0803c99ee02780d78a1dfd3419dfb84
pdf-javascript-stream PDF /JS object 13 at offset 0x328 4805 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).