PDF malware analysis — malicious · 23c36cc4bb0d3094

MALICIOUS

PDF

12.7 KB

MD5: c30c11a71d5d5f2b01ee095fae023b9e SHA-1: d97c9dae56a29c33a5fdcb163f97e0f3f4e2343b SHA-256: 23c36cc4bb0d30947baf040cff496a19dbc76a0149bb643d9d82ac3f84e6f446

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, flagged by multiple heuristics including a high-severity 'PDF_METADATA_EVAL_STAGER'. This indicates the script within the metadata is likely used to decode and execute further malicious code. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF, likely a dropper for a second-stage payload. The specific ClamAV detection name 'Pdf.Exploit.Dropped-94' is included as an IOC.

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` `f1e9b14846023dd4a67d415248dbab99430a24d0bd7c153faf1a5e94e9f39b13`	pdf-javascript-stream	PDF /JS object 76 at offset 0x30D3	331 bytes

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