PDF malware analysis — malicious · 6d3e1aadaaa1e1e2

MALICIOUS

PDF

17.7 KB

MD5: 2d822addb9e42ff29afe18c9968eafe9 SHA-1: b7fcbb3892e8f13e7dcfe76eb13c37fc6869f3a0 SHA-256: 6d3e1aadaaa1e1e26833a08c7761ffeebccd8067eb344e7cb71a17be965fec80

310 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains obfuscated JavaScript that leverages the CVE-2009-4324 vulnerability. This JavaScript is designed to download and execute a secondary payload from the URL http://gospeltube.com/cache/.svn/.p2/.l.php?l=1&spl=pdf_newplayer. The use of eval() and unescape() functions, along with complex string concatenation and encoding, indicates a deliberate attempt to hide malicious code.

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` `99230a4f4de3325ca9cc74add9a1dd8d2013b3ed5f7398a1360bfacd5cd2db39`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3192 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_obj111712_001.js` `bc56df5124d5afdd429e6988fcd0d3a36a162a4a1b85c3f79e11c0911814d5c0`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE3C	11767 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` `1742b92fff326e1ddab87c874083346485724b9a8ac799fe0daec87e675b4020`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3C69	2597 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` `859d91328beded6f58ddc443165e73037f66725ecb858c2867a26fae428e43c0`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	17712 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` `1ff75a382bc9ced1ea1e9bae41cb31db9aafd8ffcd35f036389a4b08bb957506`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE60	14466 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` `21ee63d9aab779748d5f799e25fa13fcfbd35e8378ff04f45f532ddfdc6b0a82`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3C8C	2646 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` `77e31ee392e03e0109a99a651a1f965cc21f4a579111db265d7fa458cb9d2899`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xE3C	1080 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` `393d1f4aac8f06aeb6fc2a417307bb31ab5d4a7db9c6229e422e02922909aa3c`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3C69	170 bytes
`legacy_pdfkit_stage_002.js` `2557231dd0f03ff3156e1728b5e4f21298418d93b14df3f297efe000c33deb83`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1B2	1251 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` `a13f202a343642c6e93fec28a044fe4ad85450af37cfdabbf293625868824f09`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xE3C	6430 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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