PDF malware analysis — malicious · 01470074108f90ae

MALICIOUS

PDF

4.1 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 8261a8ba13620c0239388d7fab089989 SHA-1: eaee5b8a63cf7f8b2553810dccc2e4c78229282a SHA-256: 01470074108f90aed94ae74acb252e79da27114f2e8a9b9e1fbb850cd894d156

290 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols T1105 Ingress Tool Transfer

The PDF contains embedded JavaScript that exploits CVE-2009-4324, indicated by the 'media.newPlayer' heuristic. The script is designed to download a second-stage payload from the URL http://fracala.com/bu1/news.php?dd=OkExQXtfczN4c3RyJTtnR1ZBZTZ1QmVwRUpAd14wPS9FMDVGWDhYIkQrInFnXW1xQnVhVHUibisvL2kwX0E2X3EwTSJTdVJbbDE7LDY7IlpkNStCKWgoZTFseDkiYno9eWw5KTt5biI3SzFaM0Q0S0QyQ3JTd1YiNn1eP3d6KyJWIkhTVCRsTTMibHopImls. This behavior is consistent with a downloader or initial access stage of a malware infection.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 9

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
Generic recovered JavaScript exploit stage high PDF_GENERIC_STAGE_RECOVERY

Bounded static stage recovery exposed hidden JavaScript through generic transforms such as null-byte collapse, percent decoding, marker replacement, arithmetic character codes, fromCharCode, numeric arrays, numeric-array minus-key decoders, alphabet-index arrays, /Producer half-difference metadata arrays, hex literals, marker-stripped Base64 literals, custom 6-bit XOR table decoders, or repeated-marker hex carriers. This rule is emitted only when the recovered stage contains exploit-like Acrobat JavaScript or shellcode markers.
PDF JavaScript shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL

Decoded PDF JavaScript shellcode contains a hardcoded http(s) URL stored as little-endian %uXXXX Unicode escapes. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
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://fracala.com/bu1/news.php?dd=OkExQXtfczN4c3RyJTtnR1ZBZTZ1QmVwRUpAd14wPS9FMDVGWDhYIkQrInFnXW1xQnVhVHUibisvL2kwX0E2X3EwTSJTdVJbbDE7LDY7IlpkNStCKWgoZTFseDkiYno9eWw5KTt5biI3SzFaM0Q0S0QyQ3JTd1YiNn1eP3d6KyJWIkhTVCRsTTMibHopImls

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `fe07deefdbc6e08caadd12d5be149c32547426175ee2ec362cba32c462c4adba`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3A2	2646 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`javascript_obj0013_002.js` `cbddfc85477863fb31b6600426914fcee5c25d9d3f3c9ed265bbec484dba8909`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3C4	3221 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`generic_stage_recovery_000.js` `a9878feacc363d9b7fc883e3e0542bde4b4353a0147412eab9c5cdef60c517e4`	deobfuscated-js	generic stage recovery percent-decode from JavaScript object 13 at offset 0x3A2	2644 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`generic_stage_recovery_001.js` `33bf11726db4e02d9e4898bb1b43d6a1ac001d0d92e3ff0fcddb99c37c4005ac`	deobfuscated-js	generic stage recovery percent-decode from JavaScript object 13 at offset 0x3C4	3219 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`generic_stage_recovery_002.js` `45eb5addb40f6593bb3b725587972d29abf9dcb6bc04a24aeb12b9cfcfc69c96`	deobfuscated-js	generic stage recovery percent-decode from combined JavaScript objects at offset 0x16	5895 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`combined_document_js_000.js` `fd8378a08922fec6981471703966e6bef70726051c8c9e284edce781681cf36e`	deobfuscated-js	combined document JavaScript streams at offset 0x16	5899 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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