PDF malware analysis — malicious · fd11afda59706f68

MALICIOUS

PDF

12.8 KB

MD5: a62f2b1d18be6f0898066672a1073157 SHA-1: b1d57992110fbd9e0af9ebacd2d29ce8f649ec2a SHA-256: fd11afda59706f68d71b089082cad70e9d41c0911f04382aa2576efbb80e8317

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, flagged by multiple heuristics as a stager for executing malicious code. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the 'Pdf.Exploit.Dropped-94' ClamAV signature.

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` `2bb4ee132a1aacc27923def34249dff36e200a851107bbeae402bdf6ce47cf22`	pdf-javascript-stream	PDF /JS object 76 at offset 0x30EC	331 bytes

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