PDF malware analysis — malicious · 58634a72e42f2ea3

MALICIOUS

PDF

9.8 KB

MD5: 50bb2f7fd10864b50c0b70ce64730d6e SHA-1: 2b9a7ce55f7e7b0f310a62b10b70ec55e163e205 SHA-256: 58634a72e42f2ea3de5bbdf5c1059c4e1701ae49f4a4b572ef2fae85caaeb34a

188 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains U3D content and embedded JavaScript, triggering critical heuristics for CVE-2011-2462, which involves a U3D parser exploit and JavaScript heap spray. The ML classifier strongly indicates maliciousness. The embedded JavaScript, particularly the unescape() call and the heap-spray JavaScript within the decompressed stream, is designed to exploit this vulnerability. This indicates the document's primary purpose is to leverage this exploit to compromise the user's system, likely by downloading and executing a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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)
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.
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://twitter.com/feliam

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `90c70853178b4dfbe5aeb450bc9c83613bf38a945de76ebe1faf0f9fd5312150`	pdf-javascript-stream	PDF /JS object 5 at offset 0x178	62 bytes
`javascript_obj0010_001.js` `6731a2f081381df2ebf060c225d4d3780f99662775ad76bbd937deae76aca1f4`	pdf-javascript-stream	PDF /JS object 10 at offset 0x59E	3860 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`u3d_00_off0000025c.bin` `f79e8522f672a31bcecc42ffcffba793e3187ecca4888cf754a1d82c3d5516a5`	pdf-3d-stream	PDF U3D 3D stream at offset 0x25C	393 bytes

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