PDF malware analysis — malicious · 7214d7f39a45dd1a

MALICIOUS

PDF

21.2 KB

MD5: 4fb4ce813b990f3f9544e4556852e720 SHA-1: f543e5a113636660ff5256d95bfce7664683787a SHA-256: 7214d7f39a45dd1a6e5f2b5c7f00d87abb94eadf89753b4cd876b9bf649bf8b2

310 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that utilizes the `eval()` function and string concatenation to obfuscate its true purpose. This script is designed to exploit CVE-2007-5659, specifically targeting the `Collab.collectEmailInfo` function. The primary goal of the script is to download and execute a second-stage payload from the URL http://gospeltube.com/cache/.svn/.p/.l.php?l=1&spl=pdf_collab_email, as indicated by the 'shellcode download URL' heuristic.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 9

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (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_collab_email

Extracted artifacts 10

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `8905e7a81040692460f0a4bd8c17e2ce0e52801fa9f1c7d0a87f8f5f08efbd88`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3334 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` `d979e3db40af91f29a6afe5915542b12de17896bc1f8bad791ea5738c1f9d22f`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xECA	16407 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` `30c0d5c0ae04607a4267e8986001b92f8f4c2ae203c414d25271c2bf0af6e766`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4F17	1401 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` `ed0db2af978928edea62d60a389f9be779350d138a841d5a9e97381651b7eed0`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	21297 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 15 long base64-like blob(s).
`javascript_obj111712_004.js` `ab08003778e9a14c4f1f9eb70afc656842a61d25c63b469a0f9b80084360fe52`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xEEE	17909 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 9 long base64-like blob(s).
`javascript_obj111713_005.js` `f222de494f7e308e1d20f4d08094384d80dcb991133b943c7bc0096fe27a38bd`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4F39	1450 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` `e1ef57e355b39268ad264cc25028a9a0e38b4699b467c94913104d44e9e6dafc`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xECA	1470 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `e997479581c211e9a73b883f0a007041d5b37e0c1146e0131b6457fdcea51bc3`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4F17	87 bytes
`legacy_pdfkit_stage_002.js` `5af980438f313ece58bb0b792e9e0a6eb0a6fb5465c0d1eebc013abc24178867`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1B2	1558 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_003.js` `9334cf9374f288c14ef09ccd791fe23f47cdeef591f49b886c28b511cfc7923d`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xECA	7882 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 15 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.