PDF malware analysis — malicious · 323de0b7ffb801f9

MALICIOUS

PDF

922 B

MD5: 204401d470feb7314f10789d30a8d2af SHA-1: b9c753917e28104e4da657fd93865b39a155530e SHA-256: 323de0b7ffb801f93c419f7041028d25060b7d49c8e2bc20ddd4245241cb0123

66 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, which is obfuscated and uses functions like unescape() and String.fromCharCode(). This script is designed to download and execute a secondary payload. The presence of these indicators strongly suggests a malicious intent to compromise the user's system.

Heuristics 5

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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_obj0005_000.js` `ec48892fe9bdfefaac2f48a3b23ff9285cc2c3c2ee5ea2df914e2bfaa7eb8d57`	pdf-javascript-stream	PDF /JS object 5 at offset 0x156	547 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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