PDF malware analysis — malicious · 7db0b4565e88e112

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: ef512e41ed6ee9aa789704c826daa299 SHA-1: 811c81102ce3cb44f8d55328328f64d93c442467 SHA-256: 7db0b4565e88e1129e792ade6d81754c405f9893289fdeba93d149ebd0553196

290 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that exploits CVE-2009-4324 (media.newPlayer). The script is designed to download a second-stage payload from the URL http://121.101.216.203/aaff/news.php?dd=OkExQXtfczN4c3RyPWJ0KHxBZTZ1QmVwSmRpMSldYC9FMDVGWDhYIktCInFnXW1xQnVhVHUibisyL3NmNzlZTWl2WyJTdVJbbDE7LDY7IlpkWUZPL1Y9WS0tRHQiYno9eWw5KTt5biI3SzFaM0Q0S0QyQ3JTd1YiNn1rX0wwKyJWIkhTXWkvSzMibHopImls. This indicates a downloader or droppper functionality, common in initial compromise stages.

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://121.101.216.203/aaff/news.php?dd=OkExQXtfczN4c3RyPWJ0KHxBZTZ1QmVwSmRpMSldYC9FMDVGWDhYIktCInFnXW1xQnVhVHUibisyL3NmNzlZTWl2WyJTdVJbbDE7LDY7IlpkWUZPL1Y9WS0tRHQiYno9eWw5KTt5biI3SzFaM0Q0S0QyQ3JTd1YiNn1rX0wwKyJWIkhTXWkvSzMibHopImls

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `949a35c0c0594d765cd574f8e707fa6db46f2acdfef5d564f18568b4f894ea8a`	pdf-javascript-stream	PDF /JS object 13 at offset 0x39F	2633 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`javascript_obj0013_002.js` `f9a1e4d2e7d7e08a46c4d4dda6bc9f06b4bdfd1fbf194bbc9f81841ee10f297f`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3C1	3208 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` `7fb1d01b30e43ce8c9da9c5392bba5c297f2bb817db81dd60e5eba7e4425a0ac`	deobfuscated-js	generic stage recovery percent-decode from JavaScript object 13 at offset 0x39F	2631 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` `251fa159f4531ae7e20dfe1b80c2679a8a5360a0106f53aae0d4a61e5b1044d8`	deobfuscated-js	generic stage recovery percent-decode from JavaScript object 13 at offset 0x3C1	3206 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` `36975d4750d38b1afdbff120565c0c6226595f29881fc7936df6a40aa4027f94`	deobfuscated-js	generic stage recovery percent-decode from combined JavaScript objects at offset 0x16	5866 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` `7fc22e7d6994c53d73e5103d20f5996cb2fb3aeb7b31c8fcf5d1f6260b705376`	deobfuscated-js	combined document JavaScript streams at offset 0x16	5870 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.