PDF malware analysis — malicious · 62d89d29a2a35136

MALICIOUS

PDF

13.2 KB

MD5: dee052caa42a260466228f8246607d79 SHA-1: 933a21aedf159967f6e91a3c3803704fdb53cb27 SHA-256: 62d89d29a2a3513696b12b970453ac2f99f0ea95d12956ee05092820ba2908b2

148 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains obfuscated JavaScript that utilizes eval() to execute code. The script is designed to download and execute a second-stage payload, likely a Windows executable, from a hardcoded URL. The ML classifier and heuristic firings strongly indicate malicious intent, pointing towards an exploit targeting PDF viewers.

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_obj0009_000.js` `a2c60579080af2f331699fe1b26ff257131ace6b9f310fe6774e4aa2a8bbdcc4`	pdf-javascript-stream	PDF /JS object 9 at offset 0x8A	48051 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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