PDF malware analysis — malicious · 634652e7c319be4b

MALICIOUS

PDF

12.3 KB Created: 2010-07-25 21:39:20 Authoring application: aXrPQmjEEULWszaBx (via fqGaqAOVGCNMQ)

MD5: 4b129e10845986cef9b067b3136dde88 SHA-1: 1e02499f32ae0ad35dbac10d174e0355119ab6f0 SHA-256: 634652e7c319be4b70e296a3ef9b9b8abdda30925207396dc76b55dc9c3627c3

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript that utilizes an eval() function, a common indicator of obfuscated malicious code. Heuristics and ClamAV detection confirm this is a known exploit, likely Pdf.Exploit.Agent-35572. The script's primary function is to download and execute a secondary payload, as indicated by the exploit cluster firing and the presence of obfuscated JavaScript.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Exploit.Agent-35572 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35572
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.
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_obj0007_000.js` `176f945f90c7c8f2cd8d8f63f3895bc0070fe187e50febe966f8dffb0e904a4c`	pdf-javascript-stream	PDF /JS object 7 at offset 0x2AD	11162 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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