PDF malware analysis — malicious · 39bee40b2f2e514c

MALICIOUS

PDF

547.6 KB Created: 2008-01-05 16:25:50 +01:00 Authoring application: LaTeX with hyperref package (via pdfeTeX-1.21a)

MD5: a86efb1d4f5009b359fc671b15f1ef45 SHA-1: 7b071aeb2936e8055e350bdb1dec0c4bdcba090a SHA-256: 39bee40b2f2e514c8b8ef8630117242cb480c72c78eb210280e2cb67c2cb4142

212 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript and U3D content, triggering critical heuristics for CVE-2011-2462 (U3D heap spray) and CVE-2009-3459 (U3D auto-activate). The JavaScript is heavily obfuscated but appears to be a heap spray designed to exploit these vulnerabilities, likely leading to the download and execution of a second-stage payload. The ML classifier strongly indicates maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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.
Adobe Reader U3D auto-activated 3D annotation — CVE-2009-3459 critical CVE likely CVE_2009_3459_U3D_AUTOACTIVATE

PDF contains a /Subtype /3D annotation that is configured to auto-activate on page view (/3DA <</A /PV /AIS /I>>) alongside a /U3D stream and JavaScript. This is the document shape used by CVE-2009-3459 (Adobe Reader U3D CLODProgressiveMeshDeclaration heap overflow, APSB09-15): the U3D parser runs without any user interaction once the page is rendered, while the accompanying JavaScript prepares a heap-spray to land controlled memory inside the corrupted allocation.
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.
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.
External URI info PDF_URI

PDF contains an external URL action
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://vcg.isti.cnr.it)/S/URI/Type/Action
- http://meshlab.sourceforge.net)/S/URI/Type/Action
- http://vcg.isti.cnr.it
- http://meshlab.sourceforge.net
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/pdfx/1.3/
- http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0015_000.js` `f9f5dd0fcde01a6295754401fbb17667d5b90c4a984d152d3abbbb39068a0d76`	pdf-javascript-stream	PDF /JS object 15 at offset 0x665	579669 bytes
`javascript_obj0015_001.js` `a92dae7de0e8239cac884e07a68a51ef73cf3625172366d7ff91e27ecb8bc138`	pdf-javascript-stream	PDF /JS object 15 at offset 0x698	524288 bytes
`stream_010_off0005d8f5.bin` `b1f937b9541d599e1c6000c4c47f7f3f21a4d9b0e1051c8a5580e07bc6106afd`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5D8F5	177792 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.72, consistent with packed or encrypted content.
`font_00_type1_off00056d32.bin` `d129a586d7449f3004ab2629e1b01753002037f8ca955d68339aba6fea13d9dd`	pdf-font-stream	PDF embedded font (type1) at offset 0x56D32	6428 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.55, consistent with packed or encrypted content.
`font_01_type1_off000585cd.bin` `6d68a200ddadd677e7031f9795a017ce42b4d7f02b68d39a072ecbc1e20fb5d6`	pdf-font-stream	PDF embedded font (type1) at offset 0x585CD	7849 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.64, consistent with packed or encrypted content.
`font_02_type1_off0005a499.bin` `cab7a46a0f2b73639fc37aa221b515da6888b096748ee89dec2f4876e25f7f1f`	pdf-font-stream	PDF embedded font (type1) at offset 0x5A499	2374 bytes
`font_03_type1_off0005ac8a.bin` `f1d06dc0327817e03d778a88f65436557134c269106fbc5438dd4ef0c897a441`	pdf-font-stream	PDF embedded font (type1) at offset 0x5AC8A	11287 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.76, consistent with packed or encrypted content.

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