PDF malware analysis — malicious · 1a4a4dd764bc8c20

MALICIOUS

PDF

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

MD5: fd11fcb698aee6c6c9659da5333e30cf SHA-1: b88476ae1c354cbb2cc881c3cf49ae236134268b SHA-256: 1a4a4dd764bc8c2021e99a9f61d7a4fcfabc66032e68b4322aac4faeab436dbc

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

This PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The presence of an eval() call within the JavaScript stream, flagged by the PDF_EVAL heuristic, suggests the execution of obfuscated or dynamically generated code. The ML classifier also strongly indicates maliciousness. While the exact payload is not immediately clear due to potential obfuscation, the primary attack vector involves exploiting JavaScript execution within the PDF viewer.

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` `62a4a31d4e68632de1b424de56c1e00887dd6c8477438327c1080462f81044e9`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36A	6349 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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