PDF malware analysis — malicious · daa93571dedb42e8

MALICIOUS

PDF

10.7 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 352e8b7e1cd160b40daa5c036d2744d7 SHA-1: 5511e33fb727783e7384df4413119952105bba5c SHA-256: daa93571dedb42e896099c11a6ffb3f7ff9403d04be13210427aabfaa54fa3c3

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript streams, with heuristics indicating the use of eval() and obfuscation. The ML classifier strongly suggests malicious intent. The JavaScript appears to be designed to download and execute a secondary payload, as indicated by the use of eval() and string concatenation to build executable code. The specific JavaScript content is heavily obfuscated, making a precise determination of its actions difficult, but the overall pattern is consistent with a downloader.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
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` `432eb5f56f46429f11bf85aa2bf02cd8fd38e63a3cf57a42b2fd9a862f9a33d1`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	9441 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).
`javascript_obj0013_001.js` `78e94f8d94ef197f51006d311deed033286ae88b31628e167b7a6ccc69515544`	pdf-javascript-stream	PDF /JS object 13 at offset 0x358	10147 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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