PDF malware analysis — malicious · 0e2ac569b022adad

MALICIOUS

PDF

16.1 KB Created: 2007-12-35 21:45:26 Authoring application: Adobe

MD5: 063b671fc182eea4628d9af6ec77e21f SHA-1: ee386492cb4151ad85557779b41cbece08357ed1 SHA-256: 0e2ac569b022adade6dc291026570b50703fa523b0aa69ae7db348b1e4ced8a8

148 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains multiple embedded JavaScript streams, with one being exceptionally large and heavily obfuscated. Heuristics indicate a PDF JavaScript exploit cluster, specifically involving eval() calls, which are often used to deobfuscate and execute malicious code. The script likely attempts to download and execute a secondary payload, aligning with a common attack pattern for malicious PDFs. The presence of obfuscated JavaScript and exploit-related heuristics strongly suggests malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `7a79363a8dd7203e7d734a1f90453af380c8a0abed0d3d4b895024d3c1a1932b`	pdf-javascript-stream	PDF /JS object 32 at offset 0x3A8	1485285 bytes
`javascript_obj0034_001.js` `d797de515dac4f8369b71edf86d0fc9aa8fe1224d8f9d3f1eea8a19a1f23bfc7`	pdf-javascript-stream	PDF /JS object 34 at offset 0x3D85	332 bytes
`javascript_obj0036_002.js` `351349db1f2c462951d107c63f395d2e3d546cbac252089bc55d7cd7501a396b`	pdf-javascript-stream	PDF /JS object 36 at offset 0x80	426 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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