PDF malware analysis — malicious · 9b58032aca53f26d

MALICIOUS

PDF

11.3 KB Created: 2010-02-18 11:46:56 Authoring application: Mxihamemotiifo (via qiblixa kxasiupx)

MD5: 97eec8fabd91adbe6c66a91751db8214 SHA-1: 52ee636ee7038affdefadd84f23ebee45411852d SHA-256: 9b58032aca53f26df96e615bd9be3d0f2a4b0cf6a5909eab6aa6460d67a7fe14

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains multiple critical heuristic firings indicating the exploitation of several CVEs related to JavaScript execution within PDF documents. Specifically, it leverages page-word XOR decoded JavaScript, triggered by the OpenAction, to execute malicious code. The deobfuscated JavaScript stream, page_word_xor_stage_000.js, likely downloads and executes a second-stage payload, although its exact function is obscured. The document's authoring application and creation date are also suspicious.

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_obj0016_000.js` `a40f9cf41e76ba50376d035ac164b50e0ef66c65a26eb6976bfc64d5ee0739c2`	pdf-javascript-stream	PDF /JS object 16 at offset 0x27D7	704 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` `e5d4a8f50dad8631121c2fb11acc5f298c3b1e7246807b6f7b690f49eb28b3b8`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0x9F) at offset 0x12A5	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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