PDF malware analysis — malicious · 50b27e1be7ba0e3e

MALICIOUS

PDF

2.8 KB

MD5: 3fe6be4c7bf22ffc1f1108b1eb04a88b SHA-1: 49d94d91c79d6b81c6ab58f223413d87fce43683 SHA-256: 50b27e1be7ba0e3e58b52a617447d15d5b639f1e684165110687ccbef40c0b5a

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1566.002 Spearphishing Attachment

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_UNESCAPE heuristic suggests the JavaScript is obfuscated, and ClamAV detected it as Heuristics.PDF.ObfuscatedNameObject. The embedded JavaScript file, javascript_obj0006_000.js, is the primary artifact. The obfuscated nature of the script and its embedding within a PDF strongly suggests it's designed to download and execute a secondary malicious payload, a common technique for initial access.

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 (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.
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` `55a0f00ddd8a49fe8e89813e0da5be8d8227738478b533881422c9a60695af4f`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1B4	1607 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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