PDF malware analysis — malicious · cee11201e9089b6f

MALICIOUS

PDF

4.1 KB

MD5: 62303a1ec9cf0115e30dc1bff6dfc129 SHA-1: 609ee63307b8c5c472d7d627027dd779b1b96efb SHA-256: cee11201e9089b6f66a56e490df2c3b9b89c972f5644e11b3fadf9a0c7f60038

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Scripting: JavaScript T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The JavaScript stream utilizes eval() and String.fromCharCode() for obfuscation, suggesting an attempt to download and execute a second-stage payload. The deobfuscated JavaScript stream is substantial, further supporting the malicious intent.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `9ba2b6f4a783c35b42df93c3a1cca5736e0c517db81bc4129d798f824b5ae017`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6361 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `84923b60b7f7afed74ca35401233fcbfd9ffa97e57e09105022a52019be4e727`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3617 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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