PDF malware analysis — malicious · b52c2859b99e194d

MALICIOUS

PDF

5.1 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 7b4095b183a05ceeb6142d98135aa30b SHA-1: 8f36036785172fd1434ed055208b2551078a9ead SHA-256: b52c2859b99e194db002fd26997b0d9a39093358539a148ce0c53ab07892a030

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF document contains embedded JavaScript, indicated by multiple PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic and String.fromCharCode usage suggests the JavaScript is obfuscated and likely intended to execute arbitrary code. The extracted JavaScript files, 'acroform_b64_00.js' and 'javascript_obj0013_001.js', are suspicious artifacts. The obfuscated nature of the script prevents a definitive determination of its exact payload, but the overall pattern points to a malicious PDF designed to exploit vulnerabilities or deliver further malware.

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_001.js` `c063535fe5ad5254236d7a3001f50f3a29606224a22684cebe7893e711740166`	pdf-javascript-stream	PDF /JS object 13 at offset 0x369	6705 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `998f0b285ed59e9eadbbda103ae4d423da5a9097fb06b8a8e5803f49b9b5d5d5`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x725	4350 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).

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