PDF malware analysis — malicious · f7dce8fc6dda64f9

MALICIOUS

PDF

5.5 KB

MD5: 0016f967999a3011cf3d331f746c96ca SHA-1: e852b52bc1d097be7d3ab41662b8ed41dcf24970 SHA-256: f7dce8fc6dda64f90452639932b3c363e9c70d2bf4dbbe3f1a6490b94a14abe3

114 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identifying it as a dropper. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for malware distribution. The ClamAV signature 'Pdf.Dropper.Agent-7325528-0' further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7325528-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7325528-0
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.
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed stream)

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `a3319192cac6d4dc4eeb6af2d736b0ffec979b23116a003bc7c23382761c32a5`	pdf-javascript-stream	PDF /JS object 5 at offset 0x148	733 bytes
`deobfuscated.js` `264f9bbd6f251666091e00ba083d893c1ca3196b7f8d18e40caaeb9925821c8f`	deobfuscated-js	PDF JavaScript deobfuscation pass	5870 bytes

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