PDF malware analysis — malicious · 49ee931272bfee68

MALICIOUS

PDF

12.6 KB

MD5: 0b8e4f5dadf77128ab3af06e97b2888d SHA-1: 9449077dd0fa02722743905059dba71924258fac SHA-256: 49ee931272bfee68e80a51d3526b78ec0fc9d5865222aa661e202aef6cfbefc5

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, flagged by multiple heuristics as a stager and exploit mechanism. ClamAV detection 'Pdf.Exploit.Dropped-94' further confirms its malicious nature. The ML classifier also strongly indicates maliciousness. The embedded JavaScript is likely responsible for downloading and executing a second-stage 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` `7975a4d0f46822c041e8c00e45371cf08c6873a54acdbfe1ca67352f3975f215`	pdf-javascript-stream	PDF /JS object 76 at offset 0x302F	331 bytes

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