PDF malware analysis — malicious · 6138c0188b072c1b

MALICIOUS

PDF

1.5 KB

MD5: fa6f40becadd9f39c6986f6f05123b08 SHA-1: de3fd94b47639a72a55e2f470b02e2b19961df77 SHA-256: 6138c0188b072c1bd2cb5132e59154e97de7a560838e608c0f47463e5d02f480

106 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains embedded JavaScript that leverages the CVE-2008-2992 vulnerability via `util.printf`. The script appears to be designed to allocate a large amount of memory and then execute shellcode, indicating it's likely a dropper for a secondary payload. No specific family could be identified.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 3

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.
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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `6febb0044668557919f8a5ae1fd8211b2b6bc20d3849d9d4a90794891f262289`	pdf-javascript-stream	PDF /JS object 7 at offset 0x26D	652 bytes
`javascript_obj0007_001.js` `586f884fa884aec632b36f093e76951fd0b72358620e677b4953c549ecb52ccc`	pdf-javascript-stream	PDF /JS object 7 at offset 0x26D	104 bytes
`combined_document_js_000.js` `f25a5ef4f31607335a411443e9caf0eb2fa75a4f3bcbb18d288f8be7bd7c1934`	deobfuscated-js	combined document JavaScript streams at offset 0x26D	757 bytes

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