PDF malware analysis — malicious · e49ba5b76248c0a8

MALICIOUS

PDF

37.8 KB Created: 2010-04-15 07:37:28 +04:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))

MD5: 00e29a542d649ca1b73c9d28b3899b89 SHA-1: 1b5f2515a63168e3466bad034aad6db2affd3683 SHA-256: e49ba5b76248c0a8fd4eea407647fdd69e0703357e64a48da8da1db9f5c0c3f8

114 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by ClamAV as Pdf.Dropper.Agent-7316423-0 and also triggered multiple JavaScript-related heuristics. The presence of embedded JavaScript streams and optional content groups with action triggers strongly suggests that the PDF is designed to execute malicious code upon opening. The ML classifier also provided a very high confidence score for maliciousness. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7316423-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7316423-0
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.
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0010_000.js` `178a3d59387ce4af499934b7278b56c7c00c4ae4104464f28f5e948358bc7f3b`	pdf-javascript-stream	PDF /JS object 10 at offset 0x8CCC	1346 bytes

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