PDF malware analysis — malicious · f6cdbc6d02737bf0

MALICIOUS

PDF

25.7 KB Created: 2011-72-51 03:25:00 Authoring application: String.fromCharCode

MD5: 7addcecc125d391798c5dcf0453dee21 SHA-1: da7ac57488cf474d3cad050ac490a09ccfd17ba9 SHA-256: f6cdbc6d02737bf00ffa32edeedca4a3dff20d4cde9de3d62070e246f9939eb7

64 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, identified by heuristics such as 'PDF_JAVASCRIPT' and 'PDF_JS'. The 'PDF_METADATA_EVAL_STAGER' heuristic indicates that JavaScript within the PDF metadata is used to decode and execute a stager. The 'String.fromCharCode' usage further suggests obfuscation techniques common in malicious JavaScript. No specific URLs or further script content were extracted to determine the exact payload, leading to an unknown family classification.

Heuristics 4

PDF metadata JavaScript eval stager high PDF_METADATA_EVAL_STAGER

PDF JavaScript reads document metadata fields such as title, subject, or producer, decodes character data with parseInt/String.fromCharCode style helpers, and evals the recovered stage. This is a high-signal exploit-kit staging pattern.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `575edb6b903dcd54accbd8b496dff329a631b74096b839beadb5ca5954da7198`	pdf-javascript-stream	PDF /JS object 1 at offset 0x63C3	534 bytes

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