PDF malware analysis — malicious · 16d040ce608ab474

MALICIOUS

PDF

17.8 KB

MD5: edfa8fa682f945a1838330df8ad61010 SHA-1: 5aed6e235a588bc1437d36c25b80041725032000 SHA-256: 16d040ce608ab474f707257a50bcf6e24855907c1992ca87aef029cfe8b24582

310 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains obfuscated JavaScript that exploits CVE-2009-4324, specifically targeting the media.newPlayer function. This script is designed to download and execute a second-stage payload from the URL http://gospeltube.com/cache/.svn/.p/.l.php?l=1&spl=pdf_newplayer. The presence of eval() and unescape() calls, along with the embedded URL and ClamAV detection on extracted artifacts, strongly indicates malicious intent.

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` `1ff1582e2c756832193f8b207ece7b922d9aaba3f3de95638b9d1362752225a7`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2935 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_obj111712_001.js` `d2d8d76698b0eb57a60b18522ac3f2a5fb5ddbdf5d776b5cf9a6f5da4da7bdb0`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD3B	12117 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` `df03224f897a6754c3a06e9c6e7d38ce7caa2e143a95228c764892f0e538fba5`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3CC6	2553 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_obj111711_003.js` `8f30012bcb6a91f51f88740f259f5a9d1d068f192dacb911be219de1a915ec88`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	17761 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` `809a7953cea88a0858ed12905b6b62e4b04f5a0757043cd96cad87f15fe886b6`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD5F	14772 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 8 long base64-like blob(s).
`javascript_obj111713_005.js` `837f56f06e3cda9a72e993e92afe6aa14ee9d8c7de2e3b74423fb195ee4737cc`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3CE9	2602 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).
`legacy_pdfkit_stage_000.js` `ae6f0bdfb6965b296a39453619b94d42a2d6add4bffe3f277c78c0ea4cbcf88d`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xD3B	1079 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 0x3CC6	165 bytes
`legacy_pdfkit_stage_002.js` `ae0a38f0f2b4f34b63562c96649f54e2a890edcc7fa4ece5b5548d56f551d39b`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1B2	1245 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` `4b0758537c1ebcb2862e0e8de92dec980b89a8226a75002dc38cf9b2eeef43ea`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xD3B	6395 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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