Pdf.Dropper.Agent-7212819-0 — PDF malware analysis

Static analysis result for SHA-256 536429697498d939…

MALICIOUS

PDF

2.6 KB
MD5: 42d8e9188ebc0afc6b61f70b7a243cea SHA-1: db969eff9b34ce10498bbbc625647e0fe02af542 SHA-256: 536429697498d939daf69b0c3a84f41197bb9e919331d226d73eb52378bbd0c4
166 Risk Score

Malware Insights

Pdf.Dropper.Agent-7212819-0 · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains embedded JavaScript, which utilizes eval() and unescape() functions, indicating obfuscation. The ClamAV detection 'Pdf.Dropper.Agent-7212819-0' strongly suggests its role as a dropper. The extracted JavaScript file, 'javascript_obj111611_000.js', likely contains the logic for downloading and executing a secondary payload, a common technique for this type of malware.

Heuristics 7

  • ClamAV: Pdf.Dropper.Agent-7212819-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7212819-0
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (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.
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
  • 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_obj111611_000.js
9864171cc4152f5d3e5671809dd40cebe1cf9319d0b8bfb0abd003cff50482db
pdf-javascript-stream PDF /JS object 111611 at offset 0x932 332 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s).