PDF malware analysis — malicious · 668d6dae98c23cfe

MALICIOUS

PDF

10.8 KB

MD5: d18aa2df6487b56b87cd09bb8b63449c SHA-1: e2f55e51f3a6e0d18e0e8ddecffa7c01c9ca5287 SHA-256: 668d6dae98c23cfee3a2a97f4dd7d4df9cf4be0abe73e44faf0fb2daabf30877

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file was flagged as malicious by an ML classifier and contained embedded, obfuscated JavaScript. The JavaScript stream, identified as 'javascript_obj0007_000.js', utilizes unescape functions, indicating an attempt to hide malicious code. This script is likely responsible for downloading and executing a secondary payload, a common technique for initial access.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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_obj0007_000.js` `e4a8ae308e5b41ed3f9b177db8eaf145d9c912803efd41e2f54c3738db881997`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	48774 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 249 eval/decoder/string-building token(s).

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