PDF malware analysis — malicious · aeac9a5103c187d3

MALICIOUS

PDF

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

MD5: f45bb2ad47b0082b6273eaad9133fe0c SHA-1: 4572814f9a84151007d34d6d40e2efa230012e6d SHA-256: aeac9a5103c187d32e2218e7d5e612a8c6f303e7414bb69b890b95fbbba3a79d

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

Static analysis identified multiple high-severity heuristics indicating malicious JavaScript embedded within the PDF. The ML classifier strongly flagged the PDF as malicious. The embedded JavaScript stream, named 'javascript_obj0013_001.js', is highly suspicious and likely responsible for downloading and executing a secondary payload, a common technique for initial access.

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` `57a6176cb0258073936a6963ae9029fa0c5b02ee30e9f4e3b1fdd225795adc94`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36B	6186 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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