PDF malware analysis — malicious · 4eb54008c6a03181

MALICIOUS

PDF

2.4 KB

MD5: d101245b29660283410a8c00cf989aad SHA-1: f982e2b279daf1e7974db8ed67428429232069e5 SHA-256: 4eb54008c6a03181086cda21641db3af955d59b9094e0119cf22a8ae0c801473

266 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains obfuscated JavaScript that utilizes eval() and unescape() functions, indicating an exploit attempt. The JavaScript is designed to download and execute a secondary payload, as suggested by the 'ML_NYX_PDF_MALICIOUS' and 'PDF_JS_EXPLOIT_CLUSTER' heuristics. The ClamAV detection 'Pdf.Exploit.Agent-8884' further confirms its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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.
ClamAV: Pdf.Exploit.Agent-8884 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-8884
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)
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `d83ce875123cf51ee25c5a3ac577c1a4d49d295e6e6b72c8e07480cf39ff497e`	pdf-javascript-stream	PDF /JS object 9 at offset 0xEF	7865 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 17 long hex-escaped blob(s).

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