PDF malware analysis — malicious · 0f066b364e5ede9b

MALICIOUS

PDF

19.8 KB

MD5: 41e1002c291f21f0873ced21f85f6d49 SHA-1: 3196ca24218cbad290ff1c7fa8e20f87f2117d96 SHA-256: 0f066b364e5ede9b0f750c0b1f29ee993460e5ab550e517d7b50ed1318c3ee9b

310 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that exploits CVE-2009-4324, a known vulnerability in Adobe Reader. The JavaScript is heavily obfuscated but ultimately attempts to download and execute a second-stage payload from the URL http://gospeltube.com/cache/.svn/.p2/.l.php?l=1&spl=pdf_newplayer. This indicates a malicious document designed for initial compromise.

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` `6bc7db02f1e71decade2383ea509e59c20464b78c5148088eac46f7c3803da4a`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3402 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` `4561cbafc9b7d3ee48566564fb68ef773ae3d53b053c73747a949e1d895b1092`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF0E	14075 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` `6e9c64e07d9e55acb033572140b02c6d5128cc12895a9c03f15c18d0e9277ada`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x463F	2168 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` `0d61b60b7999cec59d194d347dd18959dd3ad87a6a0376a8cf74ca0482b8559d`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	19801 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` `0803d5a6d9a09f2fbde8ab8085e5c33ec3b99298910e9d2112e3ecdc24af5835`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF32	16345 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` `593732098c22059372f1686b66e3cdb17bb966f47d0be88caa28ac47df53e8ad`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4662	2217 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` `7ea2302d74547677ef2749cfc4614fa72b2cb6da29521a7f8d356546fe7b944b`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xF0E	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` `cd7088aa0ba5ce42db7faac79c4063dccc339c8953139714658e9cb6b07c91fc`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x463F	165 bytes
`legacy_pdfkit_stage_002.js` `68993ccb7fc52fe681b0d495c0a5c6393bc91ed41e294d23df4a2bbd1b9f6824`	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` `2f28135bd6d128d7e9b6c46a7af661c0520588469f42c31f6b1545a67fdd787b`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xF0E	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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