PDF malware analysis — malicious · d4430eef3b96e69f

MALICIOUS

PDF

26.1 KB Created: 2011-72-51 03:25:00

MD5: b9e330b1a3974c4947ecbe233740c7b7 SHA-1: 509758085d1ad7cc892c1338afd7aa4bf38ae267 SHA-256: d4430eef3b96e69ff602996e8092743fded1d9f27e18cf53ebffd63a70463e77

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File: Exploitation by User Interaction

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing suggests the JavaScript is obfuscated and likely intended to execute arbitrary code. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript, named 'javascript_obj0001_000.js', is the primary artifact, and its execution is the core of the attack, likely leading to the download of further malicious content.

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` `7614efb61a51d7c04fd287e9e34bd4d25b4260900bd8731b667cf61d8f3917d9`	pdf-javascript-stream	PDF /JS object 1 at offset 0x642C	860 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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