PDF malware analysis — malicious · ccaaa14a22b252a1

MALICIOUS

PDF

8.9 KB

MD5: 67874abe6f3fa284e6e7800fea72c45f SHA-1: f0b6d13ee09e8689049bd119bc260a84186d9391 SHA-256: ccaaa14a22b252a1fd0d682380cb4c6806dfad1caca9a8d0c317a602d2659d1a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes eval() and String.fromCharCode, indicating obfuscated code execution. This JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the ClamAV detection signature 'Pdf.Exploit.Agent-36086'. The extracted JavaScript file, though large, is heavily obfuscated, preventing a more detailed analysis of its specific actions.

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` `85506bfe0f1a055249192b33b15a3a08e5637af76065786adf0f70e0396ed654`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	473899 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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