PDF malware analysis — malicious · c43a1ea92c8c2580

MALICIOUS

PDF

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

MD5: e79ec96cfffcdc2193bd627e94dbf379 SHA-1: 8f1dfc387974e805ef06ca6963bf1f8bacab0977 SHA-256: c43a1ea92c8c25802ec3a41e29f8bc65122993f028344b488ddba42fec75e83c

190 Risk Score

Malware Insights

The PDF sample contains U3D content and triggers a critical heuristic for CVE-2011-2462, indicating a heap spray exploit targeting Adobe Reader's 3D parser. This exploit is designed to execute embedded JavaScript. The presence of JavaScript actions and an unescape() call further supports the execution of malicious code. The ML classifier also flagged this PDF as highly malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9899

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)
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
- http://meshlab.sourceforge.net

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0048_000.js` `a8a1da41d93c5b2586ccafedebe721bda2830940514d2efc99e78f102519dac2`	pdf-javascript-stream	PDF /JS object 48 at offset 0x32039	6052 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_000_off000002ad.bin` `b1f937b9541d599e1c6000c4c47f7f3f21a4d9b0e1051c8a5580e07bc6106afd`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2AD	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_off0002ac27.bin` `d129a586d7449f3004ab2629e1b01753002037f8ca955d68339aba6fea13d9dd`	pdf-font-stream	PDF embedded font (type1) at offset 0x2AC27	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_off0002c3ce.bin` `6d68a200ddadd677e7031f9795a017ce42b4d7f02b68d39a072ecbc1e20fb5d6`	pdf-font-stream	PDF embedded font (type1) at offset 0x2C3CE	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_off0002e1fc.bin` `f1d06dc0327817e03d778a88f65436557134c269106fbc5438dd4ef0c897a441`	pdf-font-stream	PDF embedded font (type1) at offset 0x2E1FC	11287 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.76, consistent with packed or encrypted content.
`font_03_type1_off00030c39.bin` `cab7a46a0f2b73639fc37aa221b515da6888b096748ee89dec2f4876e25f7f1f`	pdf-font-stream	PDF embedded font (type1) at offset 0x30C39	2374 bytes

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