PDF malware analysis — malicious · e2d3f7a5971f1e65

MALICIOUS

PDF

26.9 KB Created: 2011-04-05 15:41:08 Authoring application: S[+Q~PStHF+*QrinFM@RL@Ig.HF+*QfS[+Q~PromFM@RL@ICharCHF+*QodeS[+Q~P

MD5: 13eb46636235e0f5d407864e4d15c0a6 SHA-1: 04d84e1bc0717d822f67bdb8615f420e82d7605c SHA-256: e2d3f7a5971f1e658f925d384f4228ab0234cb307eed429af7645169e67fb43e

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript, flagged by heuristics for JavaScript actions and embedded JS streams. A high-severity heuristic for PDF_EVAL indicates the use of eval(), a common technique for obfuscating malicious code. The ML classifier strongly indicates maliciousness. The embedded JavaScript file, javascript_obj0001_000.js, is likely responsible for executing the malicious payload, though its specific actions are not detailed here. The confidence is slightly reduced due to the lack of explicit URL or command execution details within the provided evidence.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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_obj0001_000.js` `826fef31516e6903f57f755af88856b393685d6ffcc603cdfcc4aae5c9be968b`	pdf-javascript-stream	PDF /JS object 1 at offset 0x23	1262 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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