PDF malware analysis — malicious · e3dbab7eaa7f733d

MALICIOUS

PDF

3.1 KB Created: 2008-08-03 07:51:49 -09:03 Authoring application: Adobe InDesign CS3 (5.0) (via Adobe PDF Library 8.1)

MD5: c2e1341d7d67ebd25c41de3ec04236a6 SHA-1: 04afa7f450fbb5c94956498ced9390edfa1733e6 SHA-256: e3dbab7eaa7f733d8e0e6a003ff174195baad9711b6ed10b5569f0e7a5ec8214

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged by ClamAV as 'Pdf.Dropper.Agent-5342606-0', indicating it's a known dropper. Static analysis revealed embedded JavaScript, including an 'unescape()' call, which is commonly used to deobfuscate malicious code. The ML classifier also strongly indicated maliciousness. The embedded JavaScript likely downloads and executes a second-stage payload, a common technique for malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-5342606-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-5342606-0
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.
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.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `63c14d4d31560c057c0bbb6c3c98b1b92baf6ad3459a72fdc5fb347485d5c666`	pdf-javascript-stream	PDF /JS object 13 at offset 0x380	2678 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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