PDF malware analysis — malicious · 954518a27d79553c

MALICIOUS

PDF

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

MD5: b33c1993707f788bca33af891c96dd24 SHA-1: 05c734258fd5c101632f6cf3bae3fc6c4ae66361 SHA-256: 954518a27d79553cea387008b5598248ec5db950fc88ae704e28b596bb9c0362

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' firing suggests the use of eval() for code execution, and 'PDF_FROMCHARCODE' points to string manipulation often used for obfuscation. The embedded JavaScript file 'javascript_obj0013_001.js' is the primary artifact. The script's obfuscated nature and the use of eval() strongly suggest it's designed to download and execute a second-stage payload, although the exact mechanism is not fully discernible due to obfuscation.

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` `49d9d47eab39e9c2b4ef11f303caa56ebee97eb9397802b790a44acc1bd57583`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	19536 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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