PDF malware analysis — malicious · b9f783935dca22a4

MALICIOUS

PDF

17.5 KB

MD5: 1a439bb2df1ea988af68b0fa5c1d3131 SHA-1: 9207944e8d8424da94f1d37c9fc91a76cf9e3bc1 SHA-256: b9f783935dca22a44c9c0bddc742c71023da05b2f1c5070690b80cd11c72f264

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Dropper.Agent-1551402' and an ML classifier indicating high maliciousness. Embedded JavaScript streams were detected, suggesting the PDF is designed to download and execute a second-stage payload. The presence of a large encoded JavaScript blob further supports this. The exact nature of the payload is not discernible from the provided evidence.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Dropper.Agent-1551402 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1551402
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_obj0022_000.js` `1e78be781c3b6d0dbae9bad23dc51b6cce63d7eae067a32513b06cccdc453dfd`	pdf-javascript-stream	PDF /JS object 22 at offset 0x312A	485210 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 555 long base64-like blob(s).

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