PDF malware analysis — malicious · 7c7b45275d0a150a

MALICIOUS

PDF

9.2 KB Created: 2010-06-17 13:34:45 Authoring application: Meramafexaue (via 80bb5Lerinolatarhe)

MD5: 97ca969c01b2e9fedf870e8a9cc455b2 SHA-1: e95862074307d5d2a41852f1e21b17ad58835dc8 SHA-256: 7c7b45275d0a150addb1ffe6c97cda9d0e3d66dd2cd998d73a763b40d43cd2da

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF document is malicious due to the exploitation of multiple known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) via XOR-decoded JavaScript embedded within the document. The 'OpenAction' trigger and the presence of deobfuscated JavaScript indicate that the file is designed to automatically execute code upon opening. This script likely downloads and executes a second-stage payload, although the exact nature of the payload cannot be determined from the static analysis alone.

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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