PDF malware analysis — malicious · c51e8cdd9ff65dc3

MALICIOUS

PDF

4.7 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 388f8cda3a2ac67a790331f6ee95bdad SHA-1: aff16f3cfc23fe86d762d180e5219a5680cd3759 SHA-256: c51e8cdd9ff65dc3b51c830b6109858ca84d067cf660814db4fbd507499e1c14

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier as malicious with a high probability. Heuristics indicate the presence of JavaScript, including an eval() call, suggesting obfuscated code execution. The embedded JavaScript artifact, javascript_obj0013_001.js, is likely responsible for downloading and executing a secondary payload, which is a common technique for malware delivery. The exact functionality of the script is obscured, leading to a moderate confidence level.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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_obj0013_001.js` `dfb6334094f4022ec5ebde8553c0a1b209a5bdbd20997db395804d1f70f1f468`	pdf-javascript-stream	PDF /JS object 13 at offset 0x363	6363 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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