PDF malware analysis — malicious · 4ddeba6d657fb286

MALICIOUS

PDF

7.8 KB Created: 2009-11-21 19:41:02 Authoring application: PDF Library 4.2.9 (via PDF Library 10.10.6)

MD5: e4314b8cfbd23c15a10b63cec6658c97 SHA-1: 51f1eca0076994c419e1195ba96b4e981d843dc1 SHA-256: 4ddeba6d657fb2867addfc45fe2d068df3366f653c687cd3659a111162c1d7ef

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ML classifier strongly flagged this PDF as malicious. The presence of ASCIIHexDecode filter with exploit indicators suggests an attempt to obfuscate malicious content. The embedded JavaScript file, javascript_obj0007_000.js, is likely responsible for executing the malicious payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `d8308d75989246a7a66beebcaa1d6c01559a6130cf3fc7c4ab5d05f5ea428724`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37329 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long hex-escaped blob(s).

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