PDF malware analysis — malicious · 44e3d0212db7ec7b

MALICIOUS

PDF

11.3 KB Created: 2010-03-08 16:43:29

MD5: fb449d1f3f17d808b1318846ffb579db SHA-1: ad8bef78fe7eb3898d92491cd4083c4f15e10485 SHA-256: 44e3d0212db7ec7bf498e7401190ae26d497d21cf08bea847697884343d0943b

288 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF file is malicious, leveraging multiple known vulnerabilities to execute embedded JavaScript. The JavaScript is XOR-decoded and obfuscated, indicating an attempt to hide its true functionality. The primary attack vector appears to be exploiting these specific CVEs within the PDF reader to achieve arbitrary code execution, likely to download and run a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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)
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_obj0020_000.js` `4ccb97787b35a70a9879ed9dbbd8bde35457a16022d36d20309ba5303994cf55`	pdf-javascript-stream	PDF /JS object 20 at offset 0x27E7	1218 bytes
`page_word_xor_stage_000.js` `0bebf987b3f9e377b66370e73edc6bed442d4a1b8aee1a48a685ef049d53506c`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0xEB) at offset 0xE0E	3247 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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