PDF malware analysis — malicious · 2c3064970b8b3b5d

MALICIOUS

PDF

3.8 KB

MD5: d6cef47f7c4e64357f46382319c613c6 SHA-1: 9affbd379ff6ea67b63e12cfab676ceaa36f8367 SHA-256: 2c3064970b8b3b5d74d78e17506f9cb00e6e905776bc68d97363d70c6607c580

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL heuristic firing suggests that the JavaScript is obfuscated and uses an eval() call, which is a common technique for executing arbitrary code. The ML classifier strongly flags this PDF as malicious. The extracted artifact javascript_obj111811_000.js is likely the source of the malicious JavaScript. The primary intent appears to be the execution of obfuscated JavaScript, likely to download and execute a second-stage payload.

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_obj111811_000.js` `be5d31b019b0807bd331434adf37e64484346da1940344034d76e4ef8c5a1aa4`	pdf-javascript-stream	PDF /JS object 111811 at offset 0x197	370 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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