PDF malware analysis — malicious · 04774a14ae057221

MALICIOUS

PDF

37.7 KB Created: 2010-04-15 22:28:43 +04:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))

MD5: e56cbabbd09f662a352168daff067fe8 SHA-1: ba85f4f94db9a8e3bb55847e7d02cdc80c8a6ac0 SHA-256: 04774a14ae057221c6874216dac5bac88b8d6b1394a7ffced84034ee79593f7f

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, flagged by multiple heuristics and identified by ClamAV as Pdf.Exploit.Agent-22953. The JavaScript code appears to be obfuscated but contains a call to `app.setTimeOut` with a string that decodes to 'evil(nuIFKLjF)', suggesting it attempts to execute a remote payload. This indicates a likely exploit targeting PDF viewers.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Exploit.Agent-22953 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-22953
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` `1d66e24d5bc65fd5eaaba8945bade21bea17053229f0ef43b6e554c022019a6c`	pdf-javascript-stream	PDF /JS object 10 at offset 0x8C8E	1344 bytes

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