PDF malware analysis — malicious · 104f07a6995872c2

MALICIOUS

PDF

37.8 KB Created: 2010-04-14 17:14:59 +04:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))

MD5: 158d4173b0c2694af2967776751ee06a SHA-1: ea6fa13bb28d51c81ec06bc891ecd83a35578a67 SHA-256: 104f07a6995872c234210fd667051a879b427a48553bf2432777f9720573ed4c

114 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript that is obfuscated but appears to construct and execute a string using the 'eval' function. This JavaScript is triggered by an optional content group, indicating an attempt to exploit a vulnerability within the PDF viewer. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Exploit.Agent-22125 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-22125
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` `b7c0d7ce17766864bec8185b799970dd5a2944ba38c5a786097a56b93425da82`	pdf-javascript-stream	PDF /JS object 10 at offset 0x8CCF	1346 bytes

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