PDF malware analysis — malicious · d1333b14fb902631

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: 21f2ccc88467a280aeb8b15c499fad52 SHA-1: 9c7e50d665876d336c4c0e30c3c719b41efa66af SHA-256: d1333b14fb9026318ef7f2a8a7b75e95a6b697dd24927e629df9f8d0cb77dc25

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. The ML classifier also flagged it as highly malicious. The embedded JavaScript stream, named 'javascript_obj0013_001.js', is likely responsible for executing malicious code, potentially downloading and running a second-stage payload. The confidence is high due to the combination of JavaScript execution indicators and the ML classification.

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` `496801abdccd9579bc8b2e3291e67cbb0583e5a7b6c00faaa3a9a87ac1129428`	pdf-javascript-stream	PDF /JS object 13 at offset 0x369	6451 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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