PDF malware analysis — malicious · 115af1900e73f75a

MALICIOUS

PDF

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

MD5: 855fe4fcec289c93d5caca21ba73c791 SHA-1: 7771bb4f978a33bb682ebe44ece2391921a8b2b1 SHA-256: 115af1900e73f75ab228553d0201dabe1f1a3339535ff114e888b3b4689dacbe

106 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains embedded JavaScript, identified by heuristics and a high ML score, which is flagged by ClamAV as Pdf.Exploit.Dropped-94. The JavaScript is heavily obfuscated but appears to be responsible for downloading and executing a secondary payload, a common technique for malware delivery.

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` `20e1d9ed61cba4794b3db99d3bf82707e207f5ad5a20edef059d3687c26773ea`	pdf-javascript-stream	PDF /JS object 76 at offset 0x955	51360 bytes

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