PDF malware analysis — malicious · f9b4bde7d840ff4b

MALICIOUS

PDF

9.2 KB Created: 2010-06-17 13:34:45 Authoring application: Meramafexaue (via edc42Lerinolatarhe)

MD5: 88ad78825af5725ed912190c6318502f SHA-1: 564c237140887541dfb7b1b13f34a65f9a6baa29 SHA-256: f9b4bde7d840ff4b36908c6411e4d232d8a55d308e5b328ac3bb3cd18fceb9cc

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1059.007 JavaScript

The PDF file contains multiple critical heuristic firings indicating the exploitation of several CVEs (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) via XOR-decoded JavaScript. This JavaScript is embedded within the document and triggered by the OpenAction. The deobfuscated script, page_word_xor_stage_000.js, is designed to execute malicious code, likely for downloading and executing a further payload. The document body is heavily obfuscated and does not provide direct clues to the user-facing lure.

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` `30ab7e5d2093f6a8d91125ab8963eb699aef7bc8b2433b9c0a5bc2d83f8bb7b7`	pdf-javascript-stream	PDF /JS object 15 at offset 0x170B	3966 bytes
`page_word_xor_stage_000.js` `8791caee3d32792d41fa0aa4fd3c6623f622ea4e3963c5b4d710e61f3a0bc69e`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0x88) at offset 0x413	3326 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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