Pdf.Dropper.Agent — PDF malware analysis

Static analysis result for SHA-256 9f2ff7a9674d8e67…

MALICIOUS

PDF

2.6 KB
MD5: 4a168237f28a3331b7ed9b927fd510dc SHA-1: d54ab4313c2f270a026873187736f80c1c47df33 SHA-256: 9f2ff7a9674d8e674bb5daca1380bd1700cb1c940f0da0b2db51dac508b97ea1
178 Risk Score

Malware Insights

Pdf.Dropper.Agent · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

This PDF file exhibits multiple high-severity heuristic firings, including PDF_UNESCAPE and PDF_U3D_CVE_RELATED, indicating it attempts to exploit known vulnerabilities. ClamAV detection as 'Pdf.Dropper.Agent-7287594-0' strongly suggests its malicious nature. The presence of embedded JavaScript, specifically 'javascript_obj0001_000.js', points towards the execution of malicious code, likely to download and execute a second-stage payload.

Heuristics 7

  • U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED
    PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
  • ClamAV: Pdf.Dropper.Agent-7287594-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7287594-0
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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.
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0001_000.js
c23daa8943d5de6d15ceb00d7b86fee5b0e9f145bf736aa0a885ad03db065b6a		 pdf-javascript-stream PDF /JS object 1 at offset 0xF 3736 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 6 eval/decoder/string-building token(s).
javascript_obj0011_001.js
ac9245d748e7972e25091c1d18299b92e3e2339ab7e73e59ebe47ccc40b8c943		 pdf-javascript-stream PDF /JS object 11 at offset 0x869 58 bytes

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