PDF malware analysis — malicious · e1d38303c060c98d

MALICIOUS

PDF

1.3 KB

MD5: 690d928d6261cc7f4a0307f3032f8197 SHA-1: 403f8564247b525a69b1fe89d60bbfdee106ee3b SHA-256: e1d38303c060c98d22f2da2309d207bb743bed8b493a5f80441bfc3b5b6f0c3c

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious Link: Malicious File

The PDF document contains embedded JavaScript, identified by multiple heuristics as a stager for executing malicious code. The 'PDF_ANNOT_SUBJECT_MARKER_EVAL_STAGER' heuristic indicates that the annotation subject is used to decode and execute JavaScript, likely to download and run a second-stage payload. The ClamAV detection further confirms its malicious nature.

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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