PDF malware analysis — malicious · ba5ed1a1a3d5050f

MALICIOUS

PDF

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

MD5: 770ca0306c4e676e3c641de9dedb4414 SHA-1: 43dee03fa833562ef9fee1b0ae6c3fa97c1b02f7 SHA-256: ba5ed1a1a3d5050fed0624917b15363ed42afbbf58be922d9a497f020525091f

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and PDF_FROMCHARCODE suggests the script is obfuscated and uses eval() to execute code. The deobfuscated JavaScript file 'acroform_b64_00.js' is likely responsible for exploiting a PDF vulnerability to download and execute a secondary payload. No specific family could be identified.

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` `9d4eede85fb007932b5e27197ae4e0d1b15a202974c8481dd356a8ae079e103f`	pdf-javascript-stream	PDF /JS object 13 at offset 0x363	6555 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` `2639b3a2038316c9132ef750cad8b46581dca16ca496a735b237db4049e2dfc3`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x719	4240 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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