PDF malware analysis — malicious · b8e8eed10acbd997

MALICIOUS

PDF

5.1 KB

MD5: 3a3aa58790153dd227bf46e6f40ef556 SHA-1: 00aa757221956d5ea15efa0ded2fb7db1ae318dd SHA-256: b8e8eed10acbd9978024c7f86729aca84185149f681ec7e960face4ff20c026f

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Scripting: JavaScript T1204.002 Malicious File: User Execution: Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing suggests that the JavaScript code is being executed dynamically, likely using eval(). The PDF_FROMCHARCODE heuristic further points to obfuscation techniques commonly used in malicious JavaScript. The extracted artifact 'javascript_obj402359_000.js' is also flagged as suspicious due to script obfuscation indicators. The overall behavior suggests the PDF is designed to exploit a vulnerability and download a secondary payload.

Heuristics 5

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_obj402359_000.js` `ceba3cc60e8c8000542be399191f4178e18483f99b104b842d72f68a729bda81`	pdf-javascript-stream	PDF /JS object 402359 at offset 0x134	8353 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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