PDF malware analysis — malicious · 2c66ba3a14c54e3d

MALICIOUS

PDF

10.1 KB Authoring application: Kolposobdio (via Dalohouibofikiporo)

MD5: d245e702d337b98e6ebaf23107b086f5 SHA-1: 6e48e6f61c4370c0eb3930f31dfaab019b8724c3 SHA-256: 2c66ba3a14c54e3d1ee4a3ccfd200a5c86c266b520feac4734c5167a134ae8af

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

This PDF document leverages multiple critical vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) by employing XOR-decoded JavaScript embedded within its structure. The JavaScript is triggered via an OpenAction, indicating an attempt to automatically execute malicious code upon opening. The presence of obfuscated JavaScript streams and extracted JS files further supports the conclusion that this file is designed to download and execute a secondary payload, although the specific destination or nature of that payload cannot be determined from the provided evidence.

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_obj0015_000.js` `1c80ec752c14acd2b502480f12a96d0ca81208c0b163672abe8450c8836d1bcc`	pdf-javascript-stream	PDF /JS object 15 at offset 0x2340	703 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`page_word_xor_stage_000.js` `a10399132b10805620eefdcc9465d6df69d4a625a367b2b96e67255a7b597a06`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0x32) at offset 0xFFA	3211 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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