PDF malware analysis — malicious · 46009f15e2c2243e

MALICIOUS

PDF

292.3 KB

MD5: b54758d4d9d7db02061ad76fc949103e SHA-1: 9c28aa9adf420de60e0b2bb378100a86f9f5c314 SHA-256: 46009f15e2c2243e95d757ac438355ac227515aadc4ced36eecafd248712c878

76 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript, named 'javascript_obj0008_000.js', is likely responsible for exploiting PDF vulnerabilities to execute malicious code. The use of ASCIIHexDecode filter further suggests an attempt to obfuscate malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `1aaf57d8a014013551f100054a01b601d13836fa635496ede5fde52d4d535e20`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1CE	99528 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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