PDF malware analysis — malicious · 48d5f31d1179749a

MALICIOUS

PDF

12.2 KB Created: 2009-11-10 19:46:80 Authoring application: PDF Library 2.1.6 (via PDF Library 2.10.10)

MD5: 226ff71d25aa7acfea8224e32fff648e SHA-1: 13ec76e8df83edd6e4c4e9c8b44e0e9fca6668ea SHA-256: 48d5f31d1179749aba218f31a2a038887cc12c3494b51bb7efb499ea0cbd747a

220 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file exploits several critical vulnerabilities in Adobe Acrobat, including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These exploits are triggered by embedded JavaScript, which is obfuscated and decoded using ASCIIHexDecode and other filters. The primary function of the embedded JavaScript is to download and execute a second-stage payload, as indicated by the 'legacy_pdfkit_stage_000.js' artifact. The attack pattern is consistent with exploit kit delivery mechanisms.

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` `cec723ca4bdc29448d7c334b487f729c41bbe053f23f6b5f77128e5a9d1fbf00`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37691 bytes
`legacy_pdfkit_stage_000.js` `830fb3b13c90551318c2c358d78618a14d2f676a2e8c6f108f12cfbaa35b5e4b`	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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