PDF malware analysis — malicious · 44a9b53a8b48d5ad

MALICIOUS

PDF

4.4 KB Created: 2009-08-23 19:47:07 Authoring application: Ela 2.6.6.3 (via PDF Library 4.8.1.5)

MD5: fa8e8da921d078679c288c0dcb3c34fc SHA-1: e763ffcf81237e6daceb5fa863b5c12baee95fef SHA-256: 44a9b53a8b48d5ad603c501baa10ac4ad2e596c90cf2a8e215930dbf3439a753

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-35794. Static analysis detected embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities. The ML classifier also strongly indicated maliciousness. The embedded JavaScript is likely responsible for executing the malicious payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Agent-35794 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35794
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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0014_000.js` `d048c52bfdb9988adc85cee218e66fd2b7aa5b1b5d361e3ea9181d610ecd68fd`	pdf-javascript-stream	PDF /JS object 14 at offset 0x398	42889 bytes
Detection ClamAV: Pdf.Exploit.Agent-35794 Obfuscation or payload: unlikely

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