PDF malware analysis — malicious · a1c2f4247af5e075

MALICIOUS

PDF

3.5 KB Created: 2009-03-24 05:27:35 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 5ef0d54fd18f37a4c379483a73cd3752 SHA-1: 9d3bafca13ebed94a6e9a84d6d299c509c91f5cd SHA-256: a1c2f4247af5e075f54ef78b14a55a9aad29538a06aa5958f30cb11c00e0a43b

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF document contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. The 'PDF_EVAL' firing specifically points to an 'eval()' call within a decoded stream, suggesting the execution of obfuscated JavaScript code. The presence of 'String.fromCharCode' further supports the use of JavaScript for dynamic code generation. The extracted artifacts 'javascript_obj0013_000.js' and 'deobfuscated.js' confirm the JavaScript content. The overall pattern suggests the JavaScript is designed to download and execute a secondary 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `675f3853210f2af38aa82732c136304261d1a371132521b1031f39bccd3d01c5`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	7154 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).
`deobfuscated.js` `04ca9f1f35fe9a9eca857fa38e08451092dbd569b098d13b72dcfe1435fbe36a`	deobfuscated-js	PDF JavaScript deobfuscation pass	15750 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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