PDF malware analysis — malicious · 97ac3240f696c4ac

MALICIOUS

PDF

14.9 KB

MD5: fc26bed2b47bfc5561b6ca2b4ee6120c SHA-1: 7270d5c00857501237efbdde5c9a4e6434692f3f SHA-256: 97ac3240f696c4acd374c745c74f5b3b92f0258df629fc02e5f50a2bd2be1795

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious content. The presence of embedded and obfuscated JavaScript, specifically noted by the 'unescape()' call and the 'PDF_JAVASCRIPT' heuristic, strongly suggests that the script is designed to perform malicious actions. The extracted artifact 'javascript_obj0006_000.js' is likely the payload. The script's obfuscation and the ML classifier's high confidence score point towards a downloader or dropper functionality.

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` `7217fd982abb868e82290a35608b086e6830701520064f1507d7d2252b176a6f`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A3	15716 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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