PDF malware analysis — malicious · ca58348b7ca19668

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: 36e72182ad113c5c41ba2a4dcc20fc1b SHA-1: 3a7dfaaaf3a91fe1be28b4045e5725aea96651f7 SHA-256: ca58348b7ca19668fc0efa9b93a397c833cb393764eeb03f16116b93aaff8d0c

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier also flagged it as malicious with high confidence. The JavaScript streams, javascript_obj0013_000.js and javascript_obj0013_001.js, are likely responsible for executing arbitrary code, potentially downloading further payloads. The obfuscation makes it difficult to determine the exact execution flow or final payload without dynamic analysis.

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` `e21a5b369fe79ff9eb405cfe9aa125676f7f8271f0484dddb7a65e34207d5be0`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	9426 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0013_001.js` `61a0298042ef2a84cb085531d53afc90d2f953d7c3732b7c9ac969bfc6a93de9`	pdf-javascript-stream	PDF /JS object 13 at offset 0x358	10132 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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