PDF malware analysis — malicious · 00473de22d4661c6

MALICIOUS

PDF

16.1 KB

MD5: e8de34de8d5d0580fe584cfd8cb8f623 SHA-1: 620cb1262de5225c32decf958965dd8c3b255041 SHA-256: 00473de22d4661c6f73f949176f1e0dabb3368ea2212390ca0ce526c9c231f73

310 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1071.001 Web Protocols

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

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/.p/.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` `898b769ce4dddb65184cbe8ba74298452d5ef930c611c05a9ea60cf3e732b33a`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2417 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` `4aaf792945c22657c8b6934bef2132db88d89a71ded87ced58a182a84a7fc22f`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xB35	11169 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_obj111713_002.js` `60234d90d8fccb735731a489c267e99bd2b14c128f14c58ce17396574946b374`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x370C	2331 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` `3681e6d33481a4e4151156db2dfd4b47b3733f5786305ee9753458b44a507a58`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	16073 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 14 long base64-like blob(s).
`javascript_obj111712_004.js` `03f0ce64231c4a9f366ac400950f015737b01c2d0f17d395cb463bc1d2fffe00`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xB59	13602 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 10 long base64-like blob(s).
`javascript_obj111713_005.js` `6b12f18a48777d2dd490cd129164b9b13590739f23fe25581a243ce7f995a055`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x372F	2380 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` `9526a841366a560a33ecefc35d0a02acfd01ea4853436bfed8e7b6bd32831823`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xB35	1074 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 0x370C	165 bytes
`legacy_pdfkit_stage_002.js` `0f172f68c70da175833c45a8201021f2a042b8d88f21777e79f2a05e33220881`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1B2	1240 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` `c3b2b3b9ef309c3e98d5990c42db3c0d699bd2bb20ccb15c8c1bd266f940bb68`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xB35	6370 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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