PDF malware analysis — malicious · 62a6745a961e44da

MALICIOUS

PDF

37.8 KB Created: 2010-04-18 11:26:17 +04:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))

MD5: bec16ff36d30b6e762679ac9d6a71e09 SHA-1: 1f7b8803702e1382c819dd44cba962b69210b706 SHA-256: 62a6745a961e44da6d0f8138d70939b357256b494052aff5d10236b492538712

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 payload. The script reconstructs a string, likely a URL or command, which is then passed to an eval function. This indicates an attempt to download and run a secondary malicious component. The ClamAV detection and ML classifier strongly suggest malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Exploit.Agent-23951 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-23951
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` `13eb0d378072829c69d9d7b7931080ef3e10be135d045d9a68c0b53f41a857c4`	pdf-javascript-stream	PDF /JS object 10 at offset 0x8CD7	1346 bytes

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