PDF malware analysis — malicious · b2103cf07212ccb9

MALICIOUS

PDF

2.6 KB

MD5: ddbdda9d0a746fed844682a10dfd7899 SHA-1: cfebcdb3c8ad36321a0c680dd2af8c36ac090d22 SHA-256: b2103cf07212ccb9fe7eaf1d46825d8fdb89d0abd556ec98c5e78bc2bf1d7ac4

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged as malicious by a machine learning classifier and ClamAV due to obfuscated JavaScript content. The embedded JavaScript stream, named 'javascript_obj0006_000.js', likely contains code to download and execute a second-stage payload. The obfuscation and use of JavaScript within a PDF are common techniques for delivering malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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` `e0df0a808025a833779afed39fcb783c7bc9a4bd34ce62db162862c0257b0842`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1AE	1435 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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