PDF malware analysis — malicious · 424d5e5cce863205

MALICIOUS

PDF

4.2 KB

MD5: 54d2c4b871cd19bb9531b15b917441ab SHA-1: 7c0250f79376c2ed21a8fc5d065ff477e877dec1 SHA-256: 424d5e5cce86320593db0827cac3e95e25462064733a14eaa60e50047e6d628e

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1566.002 Spearphishing Attachment

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_UNESCAPE. The embedded JavaScript file, 'javascript_obj0014_000.js', is likely responsible for executing the malicious payload. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further confirms the malicious nature of the file. The obfuscation suggests an attempt to evade detection and deliver a secondary payload.

Heuristics 5

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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_obj0014_000.js` `0bc49599dc64b3d18d3849ad45e8e31658b87a341ab458b335cc4ebcaee220ac`	pdf-javascript-stream	PDF /JS object 14 at offset 0x46A	2750 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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