PDF / .CGI malware analysis — malicious · 8a9d9c146998ef4a

MALICIOUS

PDF / .CGI

14.7 KB

MD5: 469518b1631586175b886469794fee55 SHA-1: be8d8b507fb1e9530f28fd29eba1d0f4d75fe404 SHA-256: 8a9d9c146998ef4a9cc68ad5ce769c501793210fabe0fe1f1cd68c3a436031ed

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, which is heavily obfuscated and uses the unescape() function. This obfuscation, combined with ClamAV's detection of 'Heuristics.PDF.ObfuscatedNameObject', strongly suggests the script is designed to download and execute a secondary payload. The extracted artifact 'javascript_obj0006_000.js' is the likely source of this malicious script. The file's nature as a PDF with embedded, obfuscated JavaScript points to a common delivery mechanism for malware.

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` `21239fca3d8356b4438125d8887bdc6c9201ef877edd205524db224312af1717`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19F	15777 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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