PDF malware analysis — malicious · b191eaea3c368436

MALICIOUS

PDF

13.5 KB Authoring application: Wodexvoliraviyma

MD5: 5b5acf7e0c6221de9fbc665c6a02ffe1 SHA-1: eea816b986682d1b11fdcbd750abd04725baf428 SHA-256: b191eaea3c3684362491b1b10f73b38e81c4fc4554570efe72ce274b18cb49cf

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

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) related to JavaScript execution within PDF files. The embedded JavaScript is XOR-decoded and obfuscated, suggesting an attempt to hide malicious code. The primary function of this script appears to be downloading and executing a secondary payload, which is a common technique for initial access and further system compromise.

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` `024da6ee140ada56a8c6685c58ccca6ba49385d7bc07a863d30c78a50c09f05a`	pdf-javascript-stream	PDF /JS object 20 at offset 0x2A3B	280523 bytes
`page_word_xor_stage_000.js` `71d81fcaead7c494d3bf949429cafadfec5c94eac9431aff0d2c6b5d1685f716`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0xA4) at offset 0xFCA	3213 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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