PDF malware analysis — malicious · 6bc38c26d3674270

MALICIOUS

PDF

9.3 KB Created: 2010-05-10 06:23:51 Authoring application: VDMiY (via PaiDyt)

MD5: 7552501dbac6a386fdf8b0e7a1851f74 SHA-1: 46319e0b3a8dd7e387e2ac37b846255893b7c403 SHA-256: 6bc38c26d36742701261a0eb79cc9309b712b80b767d1725d0e9daf313121365

148 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains embedded JavaScript that utilizes an eval() call, indicating an attempt to execute obfuscated code. This script is designed to exploit a known PDF vulnerability, likely leading to the download and execution of a secondary malicious payload. The ML classifier strongly supports the malicious nature of this file.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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)
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` `7988b9529b94d794de41aeacfd00401fdfd9d3b3fbeb3e6c668358f66c83c599`	pdf-javascript-stream	PDF /JS object 7 at offset 0x246	8094 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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