PDF malware analysis — malicious · 8c62390ee72907a3

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: 5e61bebfc0e1e2cb6f64c7781426dbbd SHA-1: e09a1cf2932352b97dbc5dce2290cbe3286347cf SHA-256: 8c62390ee72907a3f9b3d40963f6312b1e856f457369b73aaa58ac9fcc432956

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_EVAL'. The 'PDF_EVAL' and 'PDF_FROMCHARCODE' rules suggest the JavaScript is obfuscated and uses dynamic code execution. The presence of 'javascript_obj0013_001.js' as an extracted artifact further supports this. The likely intent is to download and execute a second-stage payload, although the specific URL or execution method is not directly extractable from the provided evidence.

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` `3aff85ea3b54eb8f84f812f0a1ee50f4745b7749524f30cadc6e254ba008a193`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12593 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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