PDF malware analysis — malicious · c9b325fd236f79d1

MALICIOUS

PDF

4.9 KB Created: 2010-03-01 10:40:05 Authoring application: zwd9847

MD5: 6c9031c9b9ddd5c71db9d70c305cb6c2 SHA-1: 68321bfac8029dec18616a77f0607f366190ad53 SHA-256: c9b325fd236f79d1cfd33632f02deeb22c7eb4816b4d2460339fd1b7ab4d59ed

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that exploits multiple known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659). The heuristics indicate that the JavaScript is designed to be executed by a PDF launcher, which concatenates and evaluates parts of the document's metadata. An extracted artifact was detected by ClamAV as Js.Exploit.Shellcode-18, suggesting the script's purpose is to download and execute a malicious payload. The exact payload and delivery mechanism are not fully discernible from the provided evidence.

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_obj0028_000.js` `6c2aba2cd9e89fce1d5c10609dfff352188c20cf802debb09634ee776432095a`	pdf-javascript-stream	PDF /JS object 28 at offset 0xFF3	329 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `686076108d23a1af7d33789b905c3770945c9e35aed3e8c28c1629ce89895747`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1EC	7188 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 17 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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