PDF malware analysis — malicious · ede7d546dbc97561

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: b4b4a288431e0e3fe515c3d2523f65ea SHA-1: 5f055aa6952f57c763377b044970ff07e4c4860e SHA-256: ede7d546dbc97561d290689453e79f811fa405c0fb6bd1bb929db8e8eddca1bb

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript with multiple obfuscation layers, including string concatenation and eval() calls, which is flagged by heuristics as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function of the embedded JavaScript appears to be the execution of further malicious code, likely a downloader for a second-stage payload, as suggested by the 'eval()' calls and the ML_NYX_PDF_MALICIOUS heuristic.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `82da718e6812cc3e1906be85385651339cf6d4e6a9f68e29b7da80765518e915`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13481 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).

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