PDF malware analysis — malicious · 8ca503f4e76a240c

MALICIOUS

PDF

12.3 KB Created: 2009-11-07 19:41:67 Authoring application: PDF Library 9.1.9 (via PDF Library 10.2.2)

MD5: 2310b7f5b68f965a85abd719cf622830 SHA-1: 7c685e626bc385dd7a2cb2aa41e245270c942575 SHA-256: 8ca503f4e76a240c2cae17a3f0a1e3a9666bfdb3c13d4ff40e02e038db45b4ce

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

This PDF document exploits multiple known Adobe Acrobat vulnerabilities (CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) through embedded JavaScript. The heuristics indicate that the JavaScript is obfuscated and likely decodes to malicious code. The primary function appears to be the execution of this JavaScript, which is designed to download and execute a secondary payload, as suggested by the 'legacy_pdfkit_stage_000.js' artifact.

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` `258f673f9cd12b1ac0145167a3bba62de32ee87f572039f6142da088b827ce17`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	38163 bytes
`legacy_pdfkit_stage_000.js` `ac5f6364f1166761f075458653066e163fc609a2ce583a68a5990373f4bf3e7e`	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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