PDF malware analysis — malicious · f3b6a632aa7cbb83

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: 35adaa8772c927bf2c9828cb929b49b1 SHA-1: 16cf6266f665bf9e703ee889e69227536addc9c5 SHA-256: f3b6a632aa7cbb83b4979d1a8f73022a2f3d63bc03e5e03cb34d243da50bd371

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL heuristic firing suggests that the JavaScript code is obfuscated and uses eval() to execute, and the PDF_FROMCHARCODE heuristic further points to obfuscation techniques. The extracted artifact 'javascript_obj0013_001.js' is likely the payload. The script's intent is to download and execute a second-stage payload, but the exact mechanism is obscured. The confidence is lowered due to the obfuscation making precise analysis difficult.

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` `5d6044b48d11f4587b1e833eb6ebc84f15e483e8fb1eeb382ca4c696305df243`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12655 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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