PDF malware analysis — malicious · 5bdbd2b991219d7c

MALICIOUS

PDF

18.3 KB

MD5: a079802211cd0242ea2e5a5633b0a297 SHA-1: c1a9fd2ba199a532f2365c31558103f40ca60cd3 SHA-256: 5bdbd2b991219d7caa99bc899e00ecd665f59b57d99db705d11acc35b4b5fef2

310 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains obfuscated JavaScript that leverages the CVE-2009-4324 vulnerability, specifically targeting the media.newPlayer function. This script is designed to download and execute a shellcode payload from the embedded URL http://gospeltube.com/cache/.svn/.p2/.l.php?l=1&spl=pdf_newplayer. The use of eval() and string concatenation for obfuscation is a common technique in PDF exploits.

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` `6793d5abedebc74e1a05f3daa59c2f3a68d49857eeb4c651a948bd145e3b2069`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2671 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` `3282d1239270c1f97814c4e6f321787b21b5da7851a43710bd5a7833371c5305`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xC33	12962 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` `9affa32866498e4e922a8115b266592a1f62c2a41aa4f6fc03a4c00ab5920692`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3F0B	2520 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` `56873eb950098ccabbe8e4238f47a390b50da8ea62250961244be76e266caf22`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	18309 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` `37a15867fa8f2dd9da72f40ea2a3f05e96a9a5d3f984b777eff675f59782291c`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xC57	15584 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` `079d4eafd7a3b6c4e00a700d7d15e7e6a52fe51975a6c06553250adfca3d3848`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3F2E	2569 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` `6f94895be37852587e9f88be37af7c0208ba646db91a12af1205cb03dce84381`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xC33	1088 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 0x3F0B	165 bytes
`legacy_pdfkit_stage_002.js` `5d50061fc0be662853a2151d2be82a541364ad180b25b47b414457f9c7e6b9b0`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1B2	1254 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` `f0688e4a4bf5858aa1ffe3ddc367c0ea65fb3b22073f69daf76d7a4419461a8d`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xC33	6440 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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