PDF malware analysis — malicious · c951e104a9bbf754

MALICIOUS

PDF

9.1 KB Created: 2010-06-13 18:56:02 Authoring application: Dqotahhel (via 04701Kafedezenzbi)

MD5: e7e754226ead6b9eb2824cefcec9b80a SHA-1: e936c96d7c55d21a2622e2eb3e1667bb0033efa3 SHA-256: c951e104a9bbf7548edee07c5bff520e21f09c0e111880b780a07b8496b4ceb5

338 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

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 page-word XOR decoded JavaScript. This JavaScript is designed to be executed automatically upon opening the document, serving as a stager. The primary function of this stager is to download and execute a second-stage payload from a remote source, although the specific URL or payload could not be reconstructed from the provided evidence.

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` `9e21cef371f18a33770f116d12b0d1cc23f84565817321b223492ba3abd3dac0`	pdf-javascript-stream	PDF /JS object 15 at offset 0x177D	3836 bytes
`page_word_xor_stage_000.js` `28578fba1cc4473fcad332d84276a58f22325d19955a522731be2873047714c1`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0x1C) at offset 0x826	3358 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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