PDF malware analysis — malicious · def9de55ec259895

MALICIOUS

PDF

5.8 KB

MD5: 1dc2791590f60edbaacebcb9738fac30 SHA-1: e98122a81c0b19319ac8aa16dcdbed6287f05994 SHA-256: def9de55ec25989587218248347e48586dcc9c20494ff8929283924f356fe3ce

216 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.001 PowerShell

This PDF exploits CVE-2011-2462, a known vulnerability in Adobe Reader's U3D parser, using a JavaScript heap spray. The embedded JavaScript, obfuscated and extracted as 'javascript_obj0015_000.js', is designed to leverage this exploit for initial code execution. The ML classifier strongly indicates malicious intent, and the U3D content further supports the exploitation vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 8

Adobe Reader U3D parser exploit with JavaScript heap spray critical CVE likely CVE_2011_2462_U3D_HEAPSPRAY

PDF combines U3D/3D annotation content with JavaScript heap-spray shellcode. Public CVE-2011-2462 exploit chains use a crafted U3D stream and JavaScript heap spray to control memory during Adobe Reader's U3D parser corruption.
U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0015_000.js` `1270be6b9f974f9a58477c12a741c3293a0740ed4ce4866032395fff5033cc9a`	pdf-javascript-stream	PDF /JS object 15 at offset 0x7D6	3702 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`u3d_00_off000003cb.bin` `db47f9e6c2fa22cca9aaaaba842bc1035f54c0acd3737dbd64b69dc1671da5eb`	pdf-3d-stream	PDF U3D 3D stream at offset 0x3CB	1268 bytes

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