PDF malware analysis — malicious · 1dbc829817782c04

MALICIOUS

PDF

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

MD5: cafd5def36513fa374d4b974e3680c34 SHA-1: 877b33ce768b882c4aff19dacaa40ae446f76c4b SHA-256: 1dbc829817782c0463632159a8eaa0e6f930ee5ba1a4449765acb1501fba90ac

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1027 Obfuscated Files or Information

This PDF file contains obfuscated JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a high-severity PDF_EVAL rule firing suggests the script is attempting to execute arbitrary code, likely to download and run a secondary payload. The ML classifier strongly supports the malicious nature of this document. No specific family could be identified, but the techniques point towards a downloader or dropper.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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` `6824e81331441a8ed8fabcd47a80ecf9834a74a6481979f4504e37596af7bd4c`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D6	5824 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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