Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5007d75fe01805…

MALICIOUS

PDF

2.7 KB Created: 5293-01-01 Authoring application: 5912
MD5: 65f9f7d89625a6945d352b00eee61ecf SHA-1: 18a3db7323e0528f306ec9b8e8e8eda7deb75f1e SHA-256: ed5007d75fe0180526ead91c342a44b4d1e12bbf4a10f4ecbc613658a6ec4c0a
96 Risk Score

Malware Insights

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

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 is a known exploit. The extracted JavaScript file, 'javascript_obj0013_001.js', shows signs of obfuscation and hex escape sequences, typical of malware attempting to hide its malicious actions. The primary function of this script is likely to download and execute a second-stage payload, leveraging the PDF viewer's JavaScript execution capabilities.

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
bcc955707c4afc275c7ed8fbb306c83f36347941c655752e6e13aa749e85984c
pdf-javascript-stream PDF /JS object 13 at offset 0x328 4782 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).