Malicious PDF — malware analysis report

Static analysis result for SHA-256 36eb62083e678e64…

MALICIOUS

PDF

14.7 KB Created: 2009-06-06 12:30:26 +03:00 Authoring application: NitroPDF 6.0 (via BCL easyPDF 6.00.20)
MD5: 447629cf7d93e79523556fc6744dcd56 SHA-1: dd49a430f2f7807ae8c47201a517a62518f8e163 SHA-256: 36eb62083e678e6466ef39f3381cf279660d0bd43d0c74a5e04d722f16222fb3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript with a critical eval() call, indicating it's designed to execute arbitrary code. ClamAV identified this as Pdf.Dropper.Agent-7248976-0. The JavaScript stream is obfuscated, but the presence of eval() strongly suggests it's a downloader or dropper for further malicious activity. No specific family could be confidently identified due to the obfuscation.

Heuristics 6

  • ClamAV: Pdf.Dropper.Agent-7248976-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7248976-0
  • 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.
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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_obj0015_000.js
1e12e94a7591c79b18954dc670eaa68f4f38ab4567e93df69ee0eae221cd59f9
pdf-javascript-stream PDF /JS object 15 at offset 0x315 28480 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).