PDF malware analysis — malicious · 9a09fa1fd9111bdd

MALICIOUS

PDF

9.2 KB Authoring application: Cerozavesisero (via 7049aHoro saziwat)

MD5: 35d8be02cdf03436dbb18b694ca65e2f SHA-1: f8d74061f1382dff804e0d387dac84c37a5216f9 SHA-256: 9a09fa1fd9111bdd20d4d52b76cf1d9a6e1be30cbfab32bdc2e57b2e2b1c6cbb

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file exploits multiple known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) through its OpenAction trigger. The exploit involves XOR-decoded JavaScript embedded within the document, which is designed to execute malicious code. The primary intent appears to be downloading and executing a second-stage payload, as indicated by the heuristic firings related to JavaScript execution and obfuscation.

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_obj0016_000.js` `44344bbd16daaef637130d1e6d8acf1e2f778aafd42124d3471492daa28bb0ac`	pdf-javascript-stream	PDF /JS object 16 at offset 0x1748	4049 bytes
`page_word_xor_stage_000.js` `0f8481592fa785b0dd6b5689f968a2c6a32ea28598f9f42a270731ac7fafb458`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0xCE) at offset 0x42B	3307 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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