PDF malware analysis — malicious · 1747d9ce5a5042fc

MALICIOUS

PDF

13.3 KB

MD5: 915d7782dba7d6b835a546f3d95dabaf SHA-1: 3d2bb2d79cbbaa0af2bd0dfc47ddd3fc7a545c75 SHA-256: 1747d9ce5a5042fc808e041ef12566b3f69449d7c872bbbc8668053dd43cc70d

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript that is heavily obfuscated but appears to be designed to download and execute a secondary payload. The JavaScript's obfuscation and its presence within a PDF strongly suggest an attempt to exploit a vulnerability for initial execution, followed by a download and execution phase.

Machine Learning

Nyx PDF Classifier malicious score 0.9909

Heuristics 4

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_obj0006_000.js` `0e495f894cd5e40148b223e15b97fd86a30eaae91b7cf75a4fb8c16a9ccca5f5`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19C	13979 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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