PDF malware analysis — malicious · 0e140af44450db0d

MALICIOUS

PDF

22.9 KB Created: 2011-72-51 03:25:00

MD5: ef982e0e6aa2d87ada27a329552f7d0e SHA-1: 08013e5e9a70e53be264d7422dba463167052431 SHA-256: 0e140af44450db0dec1d19efd47647ca9541b1d7a15fa6efddbbfbed9db1eba2

148 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains obfuscated JavaScript that utilizes eval() to dynamically construct and execute code. This script appears to be designed to download and execute a second-stage payload, as indicated by the PDF_JS_EXPLOIT_CLUSTER heuristic and the ML_NYX_PDF_MALICIOUS classification. The reconstructed string 'this.producer' is part of the obfuscation, and the script's ultimate goal is to execute arbitrary code.

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_obj0001_000.js` `cf5230b4c89a7eaaf9f088c3842fb7675ac1f6da7d00e450dd50138da285ea45`	pdf-javascript-stream	PDF /JS object 1 at offset 0x583A	693 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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