PDF malware analysis — malicious · 0cfdb7f127ea3d31

MALICIOUS

PDF

58.7 KB Created: 2006-02-16 15:03:51 -08:00 Authoring application: lice (via ubst)

MD5: a55ead133331c0239f2709e770a6e749 SHA-1: ea03b045ef2adc37e4484a161b348fe8b0c8d470 SHA-256: 0cfdb7f127ea3d318e68b74155bf06b64562b7f9b3c5ea19f7724bc4d940443d

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Exploit.Dropped-94. The embedded JavaScript is heavily obfuscated but appears to be designed to download and execute a secondary payload, indicated by the presence of PDF_JAVASCRIPT and PDF_JS heuristics. The document body contains metadata that does not provide further context on the lure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
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` `72f923603eba1b2de040c9494aa504cba33afa1630196cf9eebd6e52861c34a4`	pdf-javascript-stream	PDF /JS object 76 at offset 0x94B	50260 bytes

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