PDF / .COM malware analysis — malicious · 430989e6d7f1a120

MALICIOUS

PDF / .COM

2.7 KB

MD5: e6bf9ae634bf68d41de9a67b7d89218f SHA-1: 78ea72371b2b9c60cf7d97ed18fc3611a9de605a SHA-256: 430989e6d7f1a1207987600febb46fbb55e2839fb3960b92b5df571f9f51fdf2

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier also flagged this PDF with high confidence. The embedded JavaScript streams, named javascript_obj111611_000.js and javascript_obj111612_001.js, are likely responsible for executing malicious code. The exact payload and execution flow are not fully discernible due to potential obfuscation, but the presence of eval() and String.fromCharCode suggests dynamic code execution.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj111611_000.js` `f3145106daf0005072980fe89a1c03eca8e4e2ac9efd3f53e0ac38330edc2b70`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	259 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `d0fa98d75399a2c7844ada80c7171c7b8507477fb1e85109670e0645308e4fca`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x269	3292 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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