PDF malware analysis — malicious · 5fcf7659cc2d2855

MALICIOUS

PDF

9.3 KB Created: 2010-06-11 13:05:55 Authoring application: wBLgyL (via iTsEh1ksC6dQn)

MD5: 5abba373d67b6b8bf3ff88bb38d7af1e SHA-1: 82c6d9651ee07f66842e7ce172669ef290255714 SHA-256: 5fcf7659cc2d2855f321177eee497b7c75756a548c941a03a341c9c47cc5d17e

148 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript that is heavily obfuscated and utilizes eval() calls, indicating malicious intent. The ML classifier strongly flags this PDF as malicious. The JavaScript likely serves as a dropper for a second-stage payload, leveraging a known PDF exploit cluster.

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` `a37ae61c1ee8b8dae11ac02cdf87609466e5b67de7ab21cdef482e76d9a570ab`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23C	8092 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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