PDF malware analysis — malicious · 0e6b774dab352596

MALICIOUS

PDF

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

MD5: 87bfc4d92aaebe0c0c99a884cfb5cd06 SHA-1: 9ec77226c6ebf093aef843cff1673ae5f83527f0 SHA-256: 0e6b774dab352596382f78f6f583153fc1339b30b6ca987bc165efa44bc69a99

116 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, identified as a PDF JavaScript exploit cluster. The script attempts to reconstruct and execute a string, likely to download and execute a second-stage payload. The ML classifier strongly indicates maliciousness, and the presence of JavaScript points to T1059.007.

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.
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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` `2a374a9d4197e09afd3525259677ac7c753ff9eda3458d6f6b2d96faf9feb23c`	pdf-javascript-stream	PDF /JS object 1 at offset 0x56F8	360 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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