PDF malware analysis — malicious · 4cb27c6039e239ac

MALICIOUS

PDF

6.6 KB

MD5: 1a60c5e5900212b76652a6ec494d47c8 SHA-1: 1b5070fc65101280e12d0ad65130610abf584cf8 SHA-256: 4cb27c6039e239ac4d9c17dc8352cd67309cc552638a33f74dbd0de2c66daf66

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript is obfuscated using String.fromCharCode, as suggested by the PDF_FROMCHARCODE heuristic. ClamAV detected this as Pdf.Exploit.Agent-36086, and a suspicious JavaScript file was extracted. The primary attack pattern involves leveraging these embedded scripts to execute malicious code, likely for exploitation.

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
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` `a725eadeeae5b0d3b80edf9014256bb49b1bb3da8c966e3972d1f7522590657e`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	137520 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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