PDF malware analysis — malicious · ecdc42a05eec1c46

MALICIOUS

PDF

1.1 KB

MD5: c9ad5fd40a60e83c1cc23711e6bea61f SHA-1: c20fa8f1d3089c126cf9024794d84f20e101eba4 SHA-256: ecdc42a05eec1c466d6e1c52356ccccfed226d1ba61927000e91db48cc68f407

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell T1204.002 User Execution: Malicious File

The PDF file contains embedded JavaScript, flagged by multiple heuristics including a high-severity PDF_EVAL rule indicating an eval() call. The ML classifier also strongly indicates maliciousness. The embedded JavaScript, named javascript_obj0003_000.js, is likely responsible for executing malicious code, potentially downloading and running a second-stage payload. The document body text is a generic lure, providing no specific context.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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_obj0003_000.js` `ce04346428985106841c93c91f783550bd536c31ca662c4d9ab02f863d866c70`	pdf-javascript-stream	PDF /JS object 3 at offset 0x9F	218 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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