PDF malware analysis — malicious · 8d1fee11fc2a4c1f

MALICIOUS

PDF

4.9 KB

MD5: a85467d2dc3fd4026476fba8cf87ae84 SHA-1: 473ce262282b6c712adbb6ff5fe46f529ba68319 SHA-256: 8d1fee11fc2a4c1f7875a1fe55762376e07a21cbe98de388de442ad2bb0b7d86

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script Execution: JavaScript T1027 Obfuscated Files or Information

The PDF contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_UNESCAPE. The ClamAV detection further confirms its malicious nature. The embedded JavaScript stream, named 'javascript_obj0006_000.js', is likely responsible for executing the malicious payload, although its exact function is obscured by the obfuscation.

Heuristics 6

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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` `7733cb95a1f298b6285c919d288af302bd05c134ae8a034c316359cb16b8cbc9`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A5	4249 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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