PDF malware analysis — malicious · b7f3ca3a5024a81a

MALICIOUS

PDF

5.3 KB

MD5: 70f9575e4b0dbd00667fcd0383a4add2 SHA-1: 409a8ed2a328c13e57f4c29612a96420ea4c3eda SHA-256: b7f3ca3a5024a81afbd3112553e7e9a075af56cba3afbf908f3ee5ea604d9a94

84 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ClamAV detection 'Pdf.Exploit.Agent-36063' strongly suggests this is an exploit document. The presence of JavaScript streams points to the execution of malicious code, likely to download and execute a second-stage payload.

Heuristics 4

ClamAV: Pdf.Exploit.Agent-36063 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36063
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.
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed stream)

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_000_off000001cb.js` `eb39e2de4dbbc100de6d3e30aa43ff78fa075618862ba1ebba5151ea3a3b848d`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1CB	273 bytes
`deobfuscated.js` `645224974e54ae09fb5bb5fd3c69ebe0a55c646527b5fadff4c2e68699d3f990`	deobfuscated-js	PDF JavaScript deobfuscation pass	19303 bytes

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