PDF malware analysis — malicious · 8c74a70d3359a19d

MALICIOUS

PDF

12.1 KB

MD5: 12f75e7be28561d3b96c1304e3a31599 SHA-1: 0a6d02ae54a43b87afc66d30de22b708f427607d SHA-256: 8c74a70d3359a19d107b205a420a370e4205662d6a2e2d7675d585d413dda66a

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier and ClamAV as malicious and obfuscated. Heuristics indicate the presence of embedded JavaScript, including the use of String.fromCharCode and ASCIIHexDecode filters, which are common obfuscation techniques. The extracted JavaScript artifact, 'javascript_obj0007_000.js', likely contains code to download and execute a secondary payload, contributing to the malicious nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 6

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0007_000.js` `499605be88dc4fde5ba149961431acfa3894a6f8c8aad6f492082152c7b060c8`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19E	12821 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).

Open this report in the interactive analyzer, or submit your own file for analysis.