PDF malware analysis — malicious · dae6dbe7b8c56bf8

MALICIOUS

PDF

9.5 KB Authoring application: Cohefisejekahiso (via debugVetqeraceuxesom)

MD5: 42f934b33b1400a0f56ed80f6bef10b8 SHA-1: 3f134d8baf1066396f8963517597fdeb348eafdf SHA-256: dae6dbe7b8c56bf835274ce47f69aac8362caf143bf767ca71c2ed34cb607bd6

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file leverages multiple critical vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) to execute XOR-decoded JavaScript. The embedded JavaScript is obfuscated and likely serves as a downloader for further malicious activity. The PDF's OpenAction further facilitates the automatic execution of this script upon opening.

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)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
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_obj0018_000.js` `e11aac334b8d6a1c62c0438f391942af99176a2bfd11f099bc76af054f4a66a9`	pdf-javascript-stream	PDF /JS object 18 at offset 0x1A1F	3264 bytes
`page_word_xor_stage_000.js` `8a3fb521d0ff75be9144c5382def1c48bf9b80ab5f9cdb86be8ad31a49e6f729`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0xC9) at offset 0x79F	3055 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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