PDF malware analysis — malicious · cc14347e2cabfba6

MALICIOUS

PDF

4.6 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe

MD5: 18ab4b8c04a909effaf741cdab7b66db SHA-1: 07307ecc5079fa64f50aa769065d82abc04b480b SHA-256: cc14347e2cabfba6a1661b8abf0a8591e97efea6ea1e816910959cb9b4e76f7b

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The sample is a PDF file that leverages multiple critical vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) to execute embedded JavaScript. The heuristic firings indicate that the JavaScript is obfuscated and likely attempts to exploit these vulnerabilities. An extracted artifact, legacy_pdfkit_stage_000.js, was flagged by ClamAV as Js.Exploit.Shellcode-18, suggesting it contains shellcode. The overall intent appears to be the execution of a malicious second-stage payload.

Heuristics 7

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)
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `c10f422dbaaec4e4e498cd0acb7d0d89b9e239820017dbdf8aa0ab180a7e75e8`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC42	222 bytes
`javascript_obj0016_001.js` `85eab48891bfe6bf26048b5c360c9268c21645bd7550b388aa3c23fea17b4e36`	pdf-javascript-stream	PDF /JS object 16 at offset 0xD37	606 bytes
`javascript_obj0026_002.js` `87731b19116af7b44d2d91186d0da2f46be41e26dbdc6a4448d1618924d0dcd1`	pdf-javascript-stream	PDF /JS object 26 at offset 0xEEC	182 bytes
`legacy_pdfkit_stage_000.js` `0e9587c2196617c326d335c2d5b23a66e3d472a4c6900b8f016313be4fa1e27a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1E7	6448 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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