PDF malware analysis — malicious · 20887398b72d3fe8

MALICIOUS

PDF

8.9 KB

MD5: 13b18786bd1197040254a799d99ef133 SHA-1: e1a92e82533b35a98d3bf33509b355bf2f735fcd SHA-256: 20887398b72d3fe85a49cb38d3d221ad618d403a482137c74f22b94ffaae83ba

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL and PDF_FROMCHARCODE heuristic suggests the JavaScript is obfuscated and uses eval() to execute arbitrary code. ClamAV detected this as Pdf.Exploit.Agent-36086, a known exploit. The extracted artifact javascript_obj0006_000.js is highly suspicious and likely contains the malicious payload. The overall attack pattern is consistent with a malicious PDF designed to exploit viewer vulnerabilities and download further malware.

Heuristics 6

ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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` `3113517641fc0d85e6fab4e7299ce02205e152d6a923fb0758e99365c4ba3065`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	473900 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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