PDF malware analysis — malicious · ab3c8630c611478c

MALICIOUS

PDF

12.5 KB

MD5: ec5fbcfcec449088f5fe67e3028d8d1b SHA-1: bb144d72bfa7cf262e453686e9a271ffe786427e SHA-256: ab3c8630c611478cd41357b404a61c5d4cee89d8e9d012e6992393e6943f9195

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-94'. The presence of embedded JavaScript, specifically a metadata eval stager, indicates an attempt to execute arbitrary code. This JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for initial access.

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` `23666e0d7e8506d527b52add4304ded9f41b07dd0bd2a4a3cdef6d8feb43380e`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2FB1	331 bytes

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