PDF malware analysis — malicious · 6e5954dd09edbfc8

MALICIOUS

PDF

37.8 KB Created: 2010-04-11 08:40:42 +04:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))

MD5: 4a41d5bb8ad9e0bbc6e00f2006d05a33 SHA-1: 779f0ba91ccebc1e8d84f5c104c584e19fc1c2e2 SHA-256: 6e5954dd09edbfc8e7250ab2ece1764acb89c3a5efcb674948cc50785bebb2d7

114 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript that is obfuscated but appears to be designed to execute a dynamically constructed string. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of a PDF vulnerability to run this script. The script's ultimate goal is to execute a second-stage payload, as suggested by the use of 'eval' and a timer function.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Exploit.Agent-22102 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-22102
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.
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0010_000.js` `1f278dbf5a085a1e1566ca9daaadbedc52a2006b1ec6e4baf5e8c4bae25325f5`	pdf-javascript-stream	PDF /JS object 10 at offset 0x8CD5	1346 bytes

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