PDF malware analysis — malicious · 25453a5f1ad48878

MALICIOUS

PDF

6.5 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: b90d50bfdc5a86f63f24e7c4502aa8b2 SHA-1: ef40599031eb5f9fd2580d2e2f7e24ca71a3d95c SHA-256: 25453a5f1ad488787a0d41b5fdd9dc38facea14cb864779c1055f3dea5c59423

198 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.007 Command and Scripting Interpreter: JavaScript

The sample is a PDF file that exploits multiple known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) by executing embedded JavaScript. The heuristics indicate that this JavaScript is used to launch further malicious activity, likely downloading and executing a second-stage payload. The deobfuscated JavaScript files suggest a complex execution chain typical of exploit kits.

Heuristics 6

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
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)
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `3e3b5e81cd9645a21278223ca3ec299ab671511dc5d4d939a5bf26d4db3e99fa`	pdf-javascript-stream	PDF /JS object 32 at offset 0x367	306 bytes
`javascript_obj0034_001.js` `dd747cd50d13d9941e88695674026d513fa923fd06b62b8ca2ae966566ff48d4`	pdf-javascript-stream	PDF /JS object 34 at offset 0x46E	441 bytes
`javascript_obj0036_002.js` `df108a0e6159707fa4aa0676200eda82e73a455abed44497042a03252f672317`	pdf-javascript-stream	PDF /JS object 36 at offset 0x7C	290 bytes
`legacy_pdfkit_stage_000.js` `91be26a3bf133dc3029bb87d5ef62aa711d3453642ddd7fd9345ec23c910ee6c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5C4	1646 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `13c62319adb3cc8074e3213806d6dcefd470745523b2bdeb321cbd45f3894e45`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xBCD	1806 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `102d5567e3403a6fe098fa4f3ecfaaef8288a033df2a7f2ce93f0cb8d823f6f3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x11AB	2950 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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