PDF malware analysis — malicious · 2b37d98edd08d8ba

MALICIOUS

PDF

1.3 KB

MD5: a16d6ce779d69e028b97dddb4cf317ab SHA-1: ac826352047f9f878bc55bb3e0949cf92fe4e44e SHA-256: 2b37d98edd08d8ba022b250ac714111d4f7b6e9b965c43c26cd13ac14250523e

136 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF document contains embedded JavaScript, identified as a stager by the 'PDF_ANNOT_SUBJECT_MARKER_EVAL_STAGER' heuristic. This script is likely designed to download and execute a secondary payload. The ClamAV detection 'Pdf.Exploit.Agent-36065' further confirms its malicious nature, indicating a common exploit pattern within PDF files.

Heuristics 4

Annotation subject percent-decoding eval stager critical PDF_ANNOT_SUBJECT_MARKER_EVAL_STAGER

OpenAction JavaScript forces annotation enumeration, reads an annotation /Subject payload with getAnnots(), rewrites marker bytes into percent escapes, decodes it with unescape(), and dispatches it through eval. This is a high-confidence exploit-kit staging pattern. It is intentionally not mapped to CVE-2009-1492 unless getAnnots() itself carries the crafted integer or long argument shape for that vulnerability.
ClamAV: Pdf.Exploit.Agent-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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_obj0007_000.js` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A3	431 bytes

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