PDF / .PHP malware analysis — malicious · 2ae7f1471609e74b

MALICIOUS

PDF / .PHP

8.5 KB Created: 2010-05-20 22:10:07 Authoring application: Giwobadivazuoji

MD5: 0201dcf2590fefedc795a081d465401c SHA-1: 506f02da96b70adb7dcfa0adb7830ed8255c5a05 SHA-256: 2ae7f1471609e74b427fcf0f6128483fe96c80aeea99b933bc188b65f441fd53

338 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious Link

This PDF document contains multiple critical heuristic firings indicating the exploitation of several CVEs (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) through page-word XOR decoded JavaScript. The embedded JavaScript is designed to be executed automatically upon opening the PDF via an OpenAction trigger. The primary function of the JavaScript appears to be downloading and executing a second-stage payload, as indicated by the 'page_word_xor_eval_stager' heuristic. The document body is heavily obfuscated and unreadable, providing no direct clues about the lure.

Heuristics 9

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
Page-word XOR JavaScript eval stager high PDF_PAGE_WORD_XOR_EVAL_STAGER

PDF JavaScript enumerates rendered page words with getPageNthWord/getPageNumWords, extracts encoded byte fragments, XOR-decodes the stage with char-code helpers, and evals the result. This is an old exploit-kit staging pattern and is not normal document JavaScript.
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` `3101fdacfd7041156085d4b25f7eddf895cfdff9b9fe20d212cfcd6eddbd4362`	pdf-javascript-stream	PDF /JS object 15 at offset 0x170F	3149 bytes
`page_word_xor_stage_000.js` `716bb3f2c4bb5c5d03294dd84a0dfd2e4fd871c39b8e149a5bbaa7a3b6a44f75`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0xB2) at offset 0x3F4	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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