PDF malware analysis — malicious · 3d63d3c6e9315999

MALICIOUS

PDF

1.9 KB

MD5: 83c5596dbc2fe92766a369991668d713 SHA-1: 7ffad27ec9a1ceb71f59a82b612ad2a741ae6d92 SHA-256: 3d63d3c6e93159995f19a12061f76176f2b0bf559f95718f9f7c1c084adbc298

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.007 Command and Scripting Interpreter: JavaScript/TypeScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream utilizes eval() and String.fromCharCode(), suggesting obfuscation and dynamic code execution. This script is likely responsible for downloading and executing a second-stage payload. The lack of readable document body text means the specific lure cannot be determined, but the technical execution points to a 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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `32ca7036fdde23da8d0ae26d8935f3fa08307f1d18f72e9d12848203003f1b7c`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	7149 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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