PDF malware analysis — malicious · d584c1e574b87d5e

MALICIOUS

PDF

10.9 KB Authoring application: .a

MD5: 7def40ce009a22bc8281c1477da246b6 SHA-1: 598f203fccbe3701e64ba6c66c680cd7af51e13d SHA-256: d584c1e574b87d5e2a9a8c2b63e3691914cdc560c6ac0fa4a877c1037cdf3f33

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_UNESCAPE. The script, named 'javascript_obj0018_000.js', is obfuscated and likely responsible for downloading and executing a secondary payload. The presence of JavaScript actions and streams 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_obj0018_000.js` `396c856595dfe3620fc6bfdf4ff349153c03551e4f888f2119b18d9503f82d4d`	pdf-javascript-stream	PDF /JS object 18 at offset 0x4BA	163927 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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