PDF malware analysis — malicious · c8ba6357f93e3cbd

MALICIOUS

PDF

3.3 KB

MD5: 43c74582c81d9c8b25658c947e7cfdd8 SHA-1: 576f7798d97e94e1ff23b55c8d18a2842cbd6de0 SHA-256: c8ba6357f93e3cbd331bd8b542a4e6ea25b522440bffb906658e1d6cf8e6d350

176 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_UNESCAPE. The critical ClamAV detection of 'Pdf.Exploit.Agent-4076' strongly suggests a known exploit. The extracted JavaScript file, 'javascript_obj0009_000.js', likely contains the malicious code responsible for exploiting the PDF vulnerability and executing further actions, such as downloading a second-stage payload. The obfuscation and use of eval/unescape point to an attempt to hide the script's true functionality.

Heuristics 6

ClamAV: Pdf.Exploit.Agent-4076 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-4076
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)
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `83658d1836cc86f4ff72cc4bfe82eb52c6be07de744a62754da369e112df9cd0`	pdf-javascript-stream	PDF /JS object 9 at offset 0xEF	29125 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).

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