PDF malware analysis — malicious · 1bbee4822f45231f

MALICIOUS

PDF

4.7 KB

MD5: 39686383a73fbbcd7c8efda1ace0c1f8 SHA-1: 7dcb0f8ac1a03a0c2eebe0574c4a2350565548e7 SHA-256: 1bbee4822f45231f9e79746d0c867f172bb1582d2f24b511f03726b44a7a5157

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file 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 file, 'javascript_obj0006_000.js', is likely responsible for executing the malicious payload. The exact functionality of the script is obscured, but the presence of eval() and unescape() calls suggests dynamic code execution, potentially for downloading and running further malware.

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` `c11a7be379608a904d6e2b2f97a78eec53e6d01784d79e15afe4921013ab48aa`	pdf-javascript-stream	PDF /JS object 6 at offset 0x195	4084 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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