PDF malware analysis — malicious · 2f98b68ec1155d70

MALICIOUS

PDF

645 B First seen: 2026-05-10

MD5: 1766cfe62e0d98ea3702061a8df1b111 SHA-1: 53991dc25bed1df6dd994145cd3d7e7293f7e957 SHA-256: 2f98b68ec1155d705d5f53864a764faa3a680fe425e3c4996c0eb3731ac05b38

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript with an eval() call, indicating an attempt to execute arbitrary code. The JavaScript is obfuscated, making its exact function difficult to determine, but the presence of eval() strongly suggests a malicious intent, likely to download and execute a second-stage payload. The heuristics indicate suspicious JavaScript and an eval() call, supporting this assessment.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

JavaScript action low 2 related findings PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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.
Matched line in script
```
function testCallee(){var a = 'b'; app.alert('AAA');eval(arguments.callee);}
```
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js`	pdf-javascript-stream	PDF /JS object 6 at offset 0x12D	78 bytes
SHA-256: `08806aded1c24fb4dc2ae48ca0f1b74b6c5e069ed852f75281e11940718c3f95`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
Preview script First 1,000 lines of the extracted script function testCallee(){var a = 'b'; app.alert('AAA');eval(arguments.callee);}
`javascript_obj0006_001.js`	pdf-javascript-stream	PDF /JS object 6 at offset 0x155	304 bytes
SHA-256: `8c18e7e66b5c134e10be5263de5c676125ccc86c4440e564879249451cb54ff0`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
Preview script First 1,000 lines of the extracted script function testCallee(){var a = 'b'; app.alert('AAA');eval(arguments.callee);} endstream endobj xref 0 7 0000000000 65535 f 0000000017 00000 n 0000000093 00000 n 0000000134 00000 n 0000000184 00000 n 0000000248 00000 n 0000000301 00000 n trailer<</Size 7/Root 1 0 R>> startxref 440 %%EOF

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