PDF malware analysis — malicious · 9e66b5b9aebe0199

MALICIOUS

PDF

1.8 KB

MD5: 5821b30272b3f6dbc8c2d85d8b1acac6 SHA-1: f571d1198ad7657873a55e4a81e13b54b7d8e52b SHA-256: 9e66b5b9aebe01997ddbcc4b96c677a33ddb3325f16a315484e4c11ae212275d

164 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and utilizes filters like ASCIIHexDecode and ASCII85Decode, indicating an attempt to obfuscate malicious code. The critical heuristic firing for CVE-2008-2992 (util.printf) strongly suggests exploitation of a known PDF vulnerability. This points to a malicious PDF designed to deliver a payload, likely through the embedded JavaScript.

Heuristics 6

util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (matched in decompressed stream)
ClamAV: Pdf.Exploit.Agent-36183 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36183
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `f86b1e5220183f7c7e3ea8cddca0c8beed42f4aca8952f8c95b07b9823f2ed6e`	pdf-javascript-stream	PDF /JS object 6 at offset 0x138	1345 bytes

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