PDF malware analysis — malicious · 3c4ab22b93b00733

MALICIOUS

PDF

2.8 KB

MD5: c360e7b943d986467ea62f281a93b4a2 SHA-1: c27e8bc2e87560019447fdc0da59fdf1d5c2f058 SHA-256: 3c4ab22b93b00733d619eab1943619dc95e1d2812f6006bf784fbcc6240b71ac

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. The JavaScript stream, named 'javascript_obj0006_000.js', is likely responsible for executing the malicious payload. The unescape() function call further points to obfuscation techniques commonly used to hide malicious code.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 5

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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_obj0006_000.js` `09875a32005fbc2942358cbb8715873627fbeb7a13a19eee33554e9d0e550498`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A8	1643 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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