PDF malware analysis — malicious · cde2b65f718b97cc

MALICIOUS

PDF

12.2 KB Created: 2009-12-18 19:45:78 Authoring application: PDF Library 1.4.3 (via PDF Library 7.3.2)

MD5: e4187c5e5aa734e473c790cd6e1af0c1 SHA-1: 75ae8111ed445e1abd9afee208650742ae5cc97a SHA-256: cde2b65f718b97cc5f46907471b2d1ac59c1fc98f827851814aa296af6294af7

278 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF document exploits multiple critical vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992 by leveraging embedded JavaScript. The JavaScript, identified as a deobfuscated stage, is likely responsible for downloading and executing a secondary payload, as indicated by the ClamAV detection 'Js.Exploit.Shellcode-18'. The use of multiple CVEs suggests a multi-stage exploit kit.

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 1 related finding 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` `b9791a471c31b66d6ceba05cd4f276d09c4fe57da67f1012a8f48c277c496520`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37800 bytes
`legacy_pdfkit_stage_000.js` `265a9a6ea52579aa9e7d83f4f634d824b2c9fdfb572269aaf1e1e0eb9c874927`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x268	9868 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 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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