PDF malware analysis — malicious · 098b8d1396363349

MALICIOUS

PDF

17.5 KB

MD5: 23cdd00cb533b40da1da7b79db01282c SHA-1: 47be728744ac4f3c0cb6bad89cbadf26c3fba961 SHA-256: 098b8d1396363349fa70db8628a24173eb3900fd6b1d8132a67db97c8729900d

310 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains obfuscated JavaScript that leverages CVE-2009-4324, specifically targeting the media.newPlayer function. This script is designed to download a second-stage payload from the URL http://gospeltube.com/cache/.svn/.p2/.l.php?l=1&spl=pdf_newplayer. The use of eval() and unescape() functions, along with string concatenation, indicates a deliberate attempt to hide malicious code.

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. (identified after JavaScript deobfuscation)
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.
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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://gospeltube.com/cache/.svn/.p2/.l.php?l=1&spl=pdf_newplayer

Extracted artifacts 10

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `eb090fc45b0e410defe3dafd088781997a29d16bd38536d307362dd547dcf588`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3137 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111712_001.js` `f959afdb9bab3e8b2e8c7de1d9098b990439ea64786a274f973c0a1e371c4cd7`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE05	11821 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111713_002.js` `9ed811c3ce4a5bc5ba841a60cfefc50ceb8743978c627d82d67e8234c13368d6`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3C68	2371 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`javascript_obj111711_003.js` `c595a41e54f85b3ca5a372afba59331983bb9ef4c9307fb38bad1305de44b5d0`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	17485 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 15 long base64-like blob(s).
`javascript_obj111712_004.js` `d40953359858b2207442038641f79d0234712ca8089f1d6963181f2ea6f17876`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE29	14294 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 11 long base64-like blob(s).
`javascript_obj111713_005.js` `8a1b7d9f52c558bae055936976bf63d7417e8f3aeae9230bdf8c8e114e717dec`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3C8B	2420 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `c0404d9741a4c3969f9fbf9e17cdceb9c1ca6c71538179db374e7faa49f287ca`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xE05	1086 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `5091795dc7dfd1e269d30a5ab394f1536cab6157b0cb74b7e26a9fdc9129a46f`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3C68	165 bytes
`legacy_pdfkit_stage_002.js` `7458970064786c63d3d7b09d68b06934401554b1144405f58df423a6e77b0f9f`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1B2	1252 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_003.js` `29ed9c022661f83e524adfe4e187321e7391910ee4c4ac42b9a657823f2ab948`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xE05	6430 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s).

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