PDF malware analysis — malicious · 5762372204027adf

MALICIOUS

PDF

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

MD5: 3960b717f6b714f2267b96ebb6f439bf SHA-1: 490c0a5a56aff47379ce069b0b1bf75d08b830f8 SHA-256: 5762372204027adf78e9679201708404919a2e0e28cab15b5264f1ed15cc17f3

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript with multiple 'eval()' calls, indicating obfuscated malicious code. ClamAV detection as 'Pdf.Exploit.Agent-36118' and ML classification strongly suggest malicious intent. The JavaScript is likely designed to exploit a PDF reader vulnerability and download a secondary payload, as evidenced by the heuristic firings for PDF JavaScript actions and eval() calls.

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` `aea196c9ece7e44f7e0ecded873b34844fbdf9c3e3963fd47605c84fa4fc7797`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13406 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`javascript_obj0013_001.js` `1c20ccebe1a400050919c69a655c8bc1fc9b6dd8c11225b014754ee22d01ace9`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14112 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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