PDF malware analysis — malicious · 55aa8caa97f3ede2

MALICIOUS

PDF

4.3 KB

MD5: 647834aed04e96ab824307e8a80e5342 SHA-1: c8239857422a877769af5bbbd9b586fb6c2750fa SHA-256: 55aa8caa97f3ede2a35d2f35644487e4b2019eda6f75fe2997b4e34aa6b7518b

66 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The `eval()` call and `String.fromCharCode` usage suggest obfuscated JavaScript code within a JS stream. This script, named 'javascript_obj476810_000.js', is likely responsible for downloading and executing a secondary payload, a common technique for initial access.

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_obj476810_000.js` `9fd73a4669b4cee2788fbbf4fd1e1daabc2c046e90e8bab95c27dc4ef5ff67ee`	pdf-javascript-stream	PDF /JS object 476810 at offset 0x135	8315 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.