PDF malware analysis — malicious · 7305773611f4e985

MALICIOUS

PDF

12.5 KB

MD5: 43caea13216109bff5830ed06bd5d478 SHA-1: 5e6019f6f118303d51d5bcb64ad8426f6d4c94d1 SHA-256: 7305773611f4e9856d0156dcfec1049b5c1d974c143ec451c6d35bb29b778714

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript within its metadata and streams, which is designed to decode and execute a payload. The script reconstructs a string that is then evaluated, likely to download and run a second-stage exploit or malware. The ClamAV detection 'Pdf.Exploit.Dropped-94' further confirms its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
PDF metadata JavaScript eval stager high PDF_METADATA_EVAL_STAGER

PDF JavaScript reads document metadata fields such as title, subject, or producer, decodes character data with parseInt/String.fromCharCode style helpers, and evals the recovered stage. This is a high-signal exploit-kit staging pattern.
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_obj0076_000.js` `90d81ba45250344de5fc017e5277976c5135106011a6d90ec1f71d522361ec01`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2FDB	331 bytes

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