PDF malware analysis — malicious · 7d45e6a37d53c3ad

MALICIOUS

PDF

17.1 KB

MD5: 3647a149873674f2212cecf0d896ed70 SHA-1: 0cb1186dcd4d8b9d96f4576eb4726707222637ef SHA-256: 7d45e6a37d53c3ad39305022fecdcbe62cf73835bb0fab4493b80ec80629ce9c

310 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains obfuscated JavaScript that leverages the CVE-2009-4324 vulnerability. This script is designed to download and execute a shellcode payload from the URL http://gospeltube.com/cache/.svn/.p/.l.php?l=1&spl=pdf_newplayer. The use of eval() and unescape() functions, along with complex string concatenation, indicates an attempt to hide malicious activity.

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` `68d723a695157dc66be330f57d128f85a29b601120fe9c3610e920d81e2de1ba`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3234 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` `41d6b3e324274f0209e3c3183f4cb6706dc4c659e8ee2c0971af3298e670374d`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE66	11249 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` `0c8d5092a32d0fbf3a649a37628c13b6b28b4723082324528468a2df7bec91dd`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3A8D	2433 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` `6e840cf6e8231a134e4a431b2f086f1b401206acb6399478b225351961490b06`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	17072 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` `29f7bac5081cd357d713bb00bd3fbdaf961be0626bad732b3697018380a95181`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE8A	13784 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` `3a4afda98f789a629bd4e28d2915fd54ad2fa94fc52a440c0a806a97389636ba`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3AB0	2482 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` `27920ea41782e3de7681655436ad162917290e5898d36303bc383088d7d66d85`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xE66	1075 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` `21eb64ec99cff6085dd848f75f437d4f940952b625b2c75bb6f669cd36d04dd8`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3A8D	167 bytes
`legacy_pdfkit_stage_002.js` `db41421aa39ce7941b9ec063ab97e4e41dc50fc98bc2510c2e8db506923f569e`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1B2	1243 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` `593a1adac60489c0d2319d60c921ba985de83bc851129131d5f5a4f4729b4b73`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xE66	6387 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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