PDF malware analysis — malicious · 282a5e9d94c798fe

MALICIOUS

PDF

9.2 KB Authoring application: Rhozemira ui (via 6349bRcimeseyleuacilive)

MD5: 4388dc99e738863e32412052f3cf01c8 SHA-1: 544515f6504a9a0b282c1de525d99203abc9ea14 SHA-256: 282a5e9d94c798fec9b351d755ff7c7a339cc2556d7d47f944d27685dfcd9ff0

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains multiple critical heuristic firings indicating the exploitation of several CVEs (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) through XOR-decoded JavaScript. This JavaScript is embedded within the document and triggered by the OpenAction, suggesting an attempt to automatically execute malicious code upon opening. The primary intent appears to be downloading and executing a second-stage payload, as indicated by the deobfuscated JavaScript artifact.

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` `5c932cfc2299f7cd5a9fe32b5c797ecf4c4cb1e709ec91b161cb78980c646c5e`	pdf-javascript-stream	PDF /JS object 15 at offset 0x1758	3940 bytes
`page_word_xor_stage_000.js` `bc91bf407a0a3fc3deeae7b0735dc79ea32c229ed45a7d73e3070affc959d47d`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0xB4) at offset 0x7CC	3381 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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