PDF malware analysis — malicious · 788cb106ac326d27

MALICIOUS

PDF

32.8 KB Created: 2010-07-25 10:32:51

MD5: f073651097360ad6f34d6f6c3f732087 SHA-1: 2cdfa0dc20cd36e38a9caf2508594cde33f6fdaa SHA-256: 788cb106ac326d27a0785bf0d1bddcea12af0527a5b91584ae79a38760c0162a

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 utilizes eval() to decode and execute a payload. The script constructs a string by manipulating date objects and character codes, ultimately leading to the execution of arbitrary code. This is a common technique for delivering second-stage malware via malicious PDF documents.

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` `cc490baf36965876b0f5bf98587d91a43b68c1502b009363469197c559df4de6`	pdf-javascript-stream	PDF /JS object 1 at offset 0x8099	517 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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