PDF malware analysis — malicious · 7f6fefc5b1f5ad24

MALICIOUS

PDF

1.4 KB

MD5: bbec1425a8a5d1f251d4ef258c4c5c0e SHA-1: f6e6682473af2a8cb3431029e7279ab19e05657d SHA-256: 7f6fefc5b1f5ad2411c78333aa43ae12af7687f766292d539e58c192bc0b5239

188 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript that utilizes eval() and unescape() to deobfuscate and execute code. The script appears to construct a path to a DLL and then attempts to execute it, likely downloading and running a second-stage payload. The ML classifier strongly indicates maliciousness, and the techniques used are consistent with a downloader or initial access exploit.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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_obj0005_000.js` `72f4a3dc1cafd6cabd307dc2df6754ca9c75fb0c6f4aef0191b9c93528bb23ba`	pdf-javascript-stream	PDF /JS object 5 at offset 0x156	2759 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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