PDF malware analysis — malicious · a50612b50de7a099

MALICIOUS

PDF

3.4 KB Created: 2010-02-12 08:26:13 Authoring application: ae651d

MD5: f6017ad897ba29c02a4738b20e74a7c2 SHA-1: 0c81c4774fac1e84d47e15ef8ca05ab0f74b2e83 SHA-256: a50612b50de7a09946667c33cd04ba9a1dc7a7fd2479036014ced00e4c752baa

258 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious Attachment T1059.001 Command and Scripting Interpreter: JavaScript

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are leveraged to execute embedded JavaScript. Analysis of the deobfuscated JavaScript (legacy_pdfkit_stage_000.js) reveals it is designed to download and execute a secondary payload, as indicated by ClamAV detection 'Js.Exploit.Shellcode-18' on an extracted artifact. The embedded URL heuristic also suggests a download mechanism.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0011_000.js` `aa30efc1b60f3b10ff34412347b836844fdbc30e8b8e89ba4d4c6b45bb661cae`	pdf-javascript-stream	PDF /JS object 11 at offset 0xCB	198 bytes
`legacy_pdfkit_stage_000.js` `ec063f339a3891e29277f574687eec837d85b5ac43fd370dd0dfe50cdff111ee`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F9	6300 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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