PDF malware analysis — malicious · d0e73b7207d347da

MALICIOUS

PDF

12.3 KB Created: 2009-11-09 19:43:58 Authoring application: PDF Library 1.5.8 (via PDF Library 10.9.1)

MD5: 21cc195ed38ed29efe6762c51a252b79 SHA-1: 38d4e712634266fed6d9614bbfc723670d6e07b0 SHA-256: d0e73b7207d347da78f010eac8eb25b5612cb7a827d5dca3b2870a871146cdab

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF exploits multiple known vulnerabilities in Adobe Acrobat, specifically targeting Collab.getIcon, Collab.collectEmailInfo, and util.printf functions. These exploits are used to execute obfuscated JavaScript, which likely serves as a downloader for a second-stage payload. The presence of multiple CVEs and the use of obfuscated JavaScript indicate a sophisticated exploit kit designed to compromise the user's system.

Heuristics 7

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)
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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_obj0007_000.js` `f036b016d528f72cbb39c3c74f5cc808a914955990bab64a2c9bb6881ba5cfcd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	38128 bytes
`legacy_pdfkit_stage_000.js` `514940098c89028de718af05e6121480a23168ba8e13e872a227e5fdfc11d2c8`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x268	9868 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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