PDF malware analysis — malicious · 1a50bd1bb5eec2ec

MALICIOUS

PDF

12.1 KB Created: 2009-11-12 19:41:22 Authoring application: PDF Library 7.10.9 (via PDF Library 10.3.6)

MD5: 297e25033d75dfe0180345a19bec06c2 SHA-1: 3b3dcb804964dab3b2cc2cd2fc1e613b19936aee SHA-256: 1a50bd1bb5eec2ec57ca1ac65012a32fcc281a606b019d28ab84c9bf5997aa22

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file exploits multiple known vulnerabilities in Adobe Reader, specifically CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992, by leveraging embedded and obfuscated JavaScript. The embedded JavaScript, particularly the deobfuscated 'legacy_pdfkit_stage_000.js', is designed to trigger these exploits. The primary goal appears to be the execution of a second-stage payload, though the exact nature of that payload cannot be determined from the provided evidence.

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` `a7bbe453856820448f2e6352151fd803ff25c42631c9979fe5d7421ce421af66`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	38251 bytes
`legacy_pdfkit_stage_000.js` `008b489924cbf1b9b741877e3ae5d1bcc6018f29a638fa9355421d21ecb38860`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x268	9886 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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