PDF malware analysis — malicious · e0500431d813ada8

MALICIOUS

PDF

96.4 KB Authoring application: PyPDF2

MD5: 99635fc7e0521f2eda1c73e0e5bffdd0 SHA-1: b72d9ffd3f6edf341d72bf8e7b8c2241a0b17fd5 SHA-256: e0500431d813ada87a2938e7abb15345bec2128061a15e940ab249baf6de62cd

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file was flagged as malicious by an ML classifier and contains embedded JavaScript. Heuristics indicate the presence of JavaScript actions and an eval() call, suggesting the execution of obfuscated code. The embedded JavaScript streams, particularly javascript_obj0012_000.js, are likely responsible for downloading and executing a second-stage payload, which is a common technique for malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `8240a61d4f61a6b93530d2a39b1aaa2c8925b18e236c9ef1a48e0a76cb1cde58`	pdf-javascript-stream	PDF /JS object 12 at offset 0x5A7	82717 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0012_001.js` `d54d013fa8858951e7e511db7cc942bf39901cceb5f48b5f8e494cb8238791b2`	pdf-javascript-stream	PDF /JS object 12 at offset 0x5A7	630 bytes

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