PDF malware analysis — malicious · 4d4a5cea16b84cdf

MALICIOUS

PDF

25.9 KB Created: 2011-72-51 03:25:00

MD5: cc4bd2ae865b0121352a35816f771d94 SHA-1: 09cb88cce38b0b4d8ef60b534d1db9e52e9e12ae SHA-256: 4d4a5cea16b84cdfa20cc145a054d85a46603718a903193d09cb0d17998178b3

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF was flagged as malicious by an ML classifier with high confidence. Static analysis revealed embedded JavaScript with an eval() call, indicating obfuscated code execution. The JavaScript stream, named 'javascript_obj0001_000.js', is the primary artifact. The script's purpose is inferred to be the download and execution of 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_obj0001_000.js` `8632ad01abfa56f1d0f42a9e50bf74aec2d0b98e59bd5fc35165a642fde4f186`	pdf-javascript-stream	PDF /JS object 1 at offset 0x6332	926 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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