PDF malware analysis — malicious · 0d183b490ba79dc8

MALICIOUS

PDF

37.1 KB Created: 2010-04-15 07:34:31 +04:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))

MD5: 3cd697885e1a7337411e0e24287395e3 SHA-1: 3339fffb3887c11deb03287e061104f627f08155 SHA-256: 0d183b490ba79dc888f4fa672bfdb8ad843c6e47a27b7395f7f0251e784c4ca2

114 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a PDF file detected by ClamAV as Pdf.Exploit.Agent-22222. Static analysis revealed embedded JavaScript that is obfuscated but appears to be designed to download and execute a secondary payload. The script reconstructs the string 'evil(iap5XMaL)' and schedules it to run after 100 milliseconds, indicating a malicious intent to execute arbitrary code.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Exploit.Agent-22222 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-22222
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` `2ca8184f4a4ac840ee5e7a65d40d37109d005151a818039854cf7ab07944ba5a`	pdf-javascript-stream	PDF /JS object 10 at offset 0x89EE	1344 bytes

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