PDF malware analysis — malicious · a6b9a5a6ab6637e0

MALICIOUS

PDF

8.6 KB Created: 2010-02-20 20:19:03

MD5: 2cce5f9c908ee370c8b96168c278114a SHA-1: 6b840caf73cc1b68a61e4837a3c8c9661d1c13ee SHA-256: a6b9a5a6ab6637e09f4acd4eedd2b52a0d755e4d80fa39369a5dbea4951d08d6

348 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

This PDF document is malicious, exploiting multiple known Adobe Reader vulnerabilities through XOR-decoded JavaScript. The embedded JavaScript is heavily obfuscated and appears to be an exploit kit designed to branch to several specific CVEs, including CVE-2008-2992 (util.printf), CVE-2007-5659 (Collab.collectEmailInfo), CVE-2009-4324 (media.newPlayer), and CVE-2009-0927 (Collab.getIcon). The primary function of the script is to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

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)
Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KIT

One recovered JavaScript stage contains multiple version-gated Adobe Reader exploit branches. This is stronger evidence than independent API keywords: the PDF is selecting old Reader vulnerabilities by viewer version and running heap-sprayed Acrobat JavaScript exploit paths.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `28cdf7c31cee52869bb844e0068f3019b149a5d7998e6ed8944005ee218e24fd`	pdf-javascript-stream	PDF /JS object 13 at offset 0x1D3A	652 bytes
`page_word_xor_stage_000.js` `0ce3afe7664f0bcc7fa7e500c1e5e91d34f3a251d6629d809ec931f364e4ff6f`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0x8F) at offset 0x85E	3213 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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