PDF malware analysis — malicious · 6480b864ff8e0f89

MALICIOUS

PDF

17.5 KB

MD5: bed8f03b97a2e0839bdffe215a3a1551 SHA-1: ce22d260403f04a89b134fc1d5cd0f69abecbfbe SHA-256: 6480b864ff8e0f8916d51e0ceefacb53b7a7ba2c50f930f6a20f1b3cb43f8e31

310 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that leverages the CVE-2009-4324 vulnerability, specifically targeting the media.newPlayer function. This JavaScript is designed to download and execute a shellcode payload from the URL http://gospeltube.com/cache/.svn/.p2/.l.php?l=1&spl=pdf_newplayer. The presence of eval() calls and obfuscated strings within the JavaScript further 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/.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` `cfe6f7720fb5677756799ebbb4ee350d516711e20b7d32e88718777a9cfd0c1e`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2947 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_obj111712_001.js` `8e1c71c8d2a8a306c21a746e5a7af49676115247fb76e0edac020fbb0983c82d`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD47	11873 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_obj111713_002.js` `3050aa15ac61eec1b6cb6bf7f1e8a06a7fd39edfe5746574b737c4d01e2870d1`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3BDE	2470 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_obj111711_003.js` `2091de37ceaecc10239259c14c2881987696e16895efdd56d89acae30a4125b8`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	17446 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 16 long base64-like blob(s).
`javascript_obj111712_004.js` `9ec7d33a10aceb1161d91026e53a7cf18b518176e977e93aa5d5ea675bc3d0ef`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD6B	14445 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` `d1a81f6bc70be1e7f0458a0b634bb994fe0b39198c64dfd384df5dd3bc395b88`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3C01	2519 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).
`legacy_pdfkit_stage_000.js` `ee2ce1e92546e5e55eaca1f8f1f8096cbc7a28aedbabc0cc6e7389beb006de6b`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xD47	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` `47126bb9a8342aa3534f682732bda027c721fa0a76983b35e99374d1c129026a`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3BDE	170 bytes
`legacy_pdfkit_stage_002.js` `7ba467593f37782d29ae19875b63356c2725b81133da2cb89c3cbc6a1cbfa33a`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1B2	1257 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` `875e5997691e25ed1094e7208b05d7f36e4d44f9f69e4e622e4964ab0a51238f`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xD47	6460 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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