PDF malware analysis — malicious · b1016312058449e1

MALICIOUS

PDF

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

MD5: c9a63a10eaaccfc2871d9829055bafa1 SHA-1: 4a3d46436196f42c3a7f02eb7387ef64d21ce67b SHA-256: b1016312058449e1ec0665d3dd0e3334c44a6bbf8fe32573abc56d5ec74eb0f9

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript with multiple eval() calls, indicating obfuscated code execution. ClamAV detection as 'Pdf.Exploit.Agent-36118' and ML classification strongly suggest malicious intent. The JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for PDF-based exploits. The obfuscation makes it difficult to determine the exact payload or destination without further dynamic analysis.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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` `ebf762a205983bf80f2ad45243724b8c6bfd74d6c7c561fd0485750e53e06230`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13450 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 12 long base64-like blob(s).
`javascript_obj0013_001.js` `d9ad9397c3b6e1fd5b1ced8c6f85f076b16d2de977c8f1c4332886d457f887e0`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14156 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 12 long base64-like blob(s).

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