PDF malware analysis — malicious · 7139b6032264b194

MALICIOUS

PDF

2.1 KB

MD5: 4c669cb860f63eefa445828861000d4f SHA-1: ea1da79ec66282dd45ef75cd4fabb46ce6b78750 SHA-256: 7139b6032264b194f7cf9e36b9be49cd8ecc22ce1c03f6ff43dd8343d892c8d0

266 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains obfuscated JavaScript, including calls to eval() and unescape(), which are commonly used to hide malicious code. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded JavaScript is designed to download and execute a second-stage payload, as suggested by the 'Pdf.Dropper' classification.

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.Dropper.Agent-7685790-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7685790-0
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` `de9f9390780493a4727c4fd5465de09f0df8c516328a9c330f567448cd696888`	pdf-javascript-stream	PDF /JS object 9 at offset 0xEF	7465 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).

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