PDF malware analysis — malicious · 21118465caf31e1f

MALICIOUS

PDF

7.8 KB Created: 2010-05-25 21:28:57 Authoring application: Hilokodisaxu (via Limegomeuilineg)

MD5: d1fc3ad54888a99cd063a718c44a6136 SHA-1: a0bc481a0f76a5933b3505e2a4d5ce0724ad7487 SHA-256: 21118465caf31e1fb8d2040f2628ec8b667d7de8d4ff55180672a6cb6e10f652

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File: User Execution: Malicious File

The PDF file contains embedded JavaScript that is XOR-decoded and then evaluated, exploiting multiple known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992). The presence of 'OpenAction' and JavaScript actions indicates an attempt to automatically execute code upon opening the document. The deobfuscated JavaScript likely serves as a downloader for further malicious activity.

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_obj0013_000.js` `acf0ffa75ba4d8f5fd37aa42be8aa4ade9a191dbb87740980ac71c459ec3957e`	pdf-javascript-stream	PDF /JS object 13 at offset 0x13C3	3437 bytes
`page_word_xor_stage_000.js` `716bb3f2c4bb5c5d03294dd84a0dfd2e4fd871c39b8e149a5bbaa7a3b6a44f75`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0xE9) at offset 0x436	3575 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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