PDF malware analysis — malicious · 80203204d5a884b7

MALICIOUS

PDF

13.3 KB

MD5: ba33a56097eb45087d0d089f36995381 SHA-1: 8d782a3110e82d3fa3a0837169f3e7ba694e531d SHA-256: 80203204d5a884b7b97a21efbcf2bfeaa3c632b6c506fbfc71a1cd9c98349978

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

The PDF file contains multiple critical heuristic firings indicating the exploitation of several CVEs related to JavaScript execution within PDF documents. The embedded JavaScript, XOR-decoded from page words, is highly obfuscated and likely serves as a downloader for further malicious activity. The specific CVEs targeted suggest an attempt to exploit known vulnerabilities in PDF readers to gain initial access. The file's purpose is to deliver a secondary payload through these exploits.

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` `ab279c54dd4794920498269ddff8643c5c740bd56e3ef9f507dbb47aa58371c2`	pdf-javascript-stream	PDF /JS object 20 at offset 0x29F6	280653 bytes
`page_word_xor_stage_000.js` `0bebf987b3f9e377b66370e73edc6bed442d4a1b8aee1a48a685ef049d53506c`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0x57) at offset 0x98F	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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