PDF malware analysis — malicious · e3246ade1521e9e4

MALICIOUS

PDF

6.5 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: d1447c523b0532bda5e4dd4dbadf153b SHA-1: d6e7dad1dd004645b4d694b3aa7b730568001cfd SHA-256: e3246ade1521e9e48cf35f62326d1f5b2808cece6787ffd81c64e2ef5c398613

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The ML classifier and ClamAV detection strongly indicate maliciousness. The JavaScript is heavily obfuscated using eval() calls and string concatenation, making its exact function difficult to determine statically. However, the presence of eval() and the ML classification suggest it's designed to download and execute a secondary payload. The reconstructed string 'Math.ceil(J6T7t6Pb5q5V/aLD5BbAyvoN7' is part of this obfuscation.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-35587 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35587
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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_obj0013_001.js` `7e609ce4d99d36712498d59e613c45904805aeee9f28194161d204e0a334abac`	pdf-javascript-stream	PDF /JS object 13 at offset 0x38E	5165 bytes
Detection ClamAV: Pdf.Exploit.Agent-35587 Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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