PDF malware analysis — malicious · 2e3879ba609270ec

MALICIOUS

PDF

4.1 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: cba3fa4857bee03a1bd1b46aabd03702 SHA-1: 194f55675214421df8a65f82d8f036d5a48c6740 SHA-256: 2e3879ba609270eca29af46d0f3ee2d33008ef90ce5b913d1fc437bda33c241f

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The PDF_EVAL heuristic specifically points to an eval() call within a decoded stream, suggesting the execution of obfuscated JavaScript. The presence of String.fromCharCode further supports the use of dynamic code generation. While the exact payload is not immediately clear due to obfuscation, the techniques used strongly indicate an attempt to download and execute a second-stage payload.

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_obj0013_001.js` `edb04e4de78baba1ba22da422be4d23a0f0ff3d9ecfcd524fa1a3a813f3c46f4`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12685 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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