PDF malware analysis — malicious · afcca70da61ba548

MALICIOUS

PDF

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

MD5: 7f2bd28dd4a8e8d9a8b608eea68bfd99 SHA-1: 1134d60e23b896c98fb01f42f363dd3affd1df2f SHA-256: afcca70da61ba5483846569b1ebad74f490f9011f1de6a8ca6bbeb41e236b5da

64 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_METADATA_EVAL_STAGER heuristic suggests that the JavaScript is used to decode and execute further code, likely a downloader. The use of String.fromCharCode further supports obfuscation techniques common in malicious PDFs. No specific family could be identified, but the overall pattern points to a malicious PDF dropper.

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` `e4ede68be19c8d91995056cdcd51b6b49ed3a952151d0814eabb4c8937721f4f`	pdf-javascript-stream	PDF /JS object 1 at offset 0x6142	523 bytes

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