PDF malware analysis — malicious · 5f2e5e1eb424d5f5

MALICIOUS

PDF

37.7 KB Created: 2010-04-11 08:38:23 +04:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))

MD5: b47ac095270e0d1eabe80504fa76fbc4 SHA-1: f352719ca09720c8aeb20a03dc25b1f349bd8471 SHA-256: 5f2e5e1eb424d5f5fa3710fda5b4fbee403ef4f13fdaf1f992aa53a73a22c1d7

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-22579 and flagged by an ML classifier. It contains embedded JavaScript that is obfuscated but appears to construct a string and then execute it using `eval`. This JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for exploiting PDF vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Exploit.Agent-22579 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-22579
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` `e8ff62e424870e83cade9623f9518abcc76ccc89d31b240e64c9a66b31d79fcf`	pdf-javascript-stream	PDF /JS object 10 at offset 0x8C98	1346 bytes

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