PDF malware analysis — malicious · 7db5b683b7e3508f

MALICIOUS

PDF

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

MD5: 2c31c1f06b5b1a501c7e2a78c34ae098 SHA-1: f3afe03427e914cb32e95ae35b85d7bfcffdf750 SHA-256: 7db5b683b7e3508f1a346fb0c6ca6d479dbc21b9cea439fb79ae4ae5ef84003b

130 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript, named 'javascript_obj0013_001.js', is likely responsible for the malicious behavior, potentially downloading and executing a second-stage payload or exploiting a vulnerability. The use of eval() and unescape() suggests obfuscation within the script.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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` `2499bab80ca356f3c197086539a7b89c669409e10a9268436eeeba447215a4fa`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36B	3251 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).

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