PDF malware analysis — malicious · b7fa62e3ae4801a4

MALICIOUS

PDF

1.3 KB

MD5: c16f4cc276701b869a92753751b03356 SHA-1: a0bab206c960ba97e79b76cd391e7fa9d027cd37 SHA-256: b7fa62e3ae4801a432c520c9c275584f894a70dc409d9ebb16967d7792461699

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL, indicating the presence and execution of JavaScript. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript, identified as 'javascript_obj0009_000.js', likely downloads and executes a second-stage payload, as indicated by the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings. The 'eval()' call within the JavaScript stream is a common technique for obfuscating malicious code execution.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7216831-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7216831-0
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_obj0009_000.js` `8559d92908efb8de63ed09bcb459339207c045b3b102737910ed5ce28dd9b08b`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	2443 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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