PDF malware analysis — malicious · b0a5d9100ac0fa15

MALICIOUS

PDF

4.8 KB Created: 2010-03-14 12:39:26 Authoring application: zwb2664

MD5: 104953fe36093d34e0eed39137dbac83 SHA-1: b862aad13c18ab2be01f699baea286ff51a7cf34 SHA-256: b0a5d9100ac0fa15c068836b38ff7b3f9eea931fa599e4e5be292168d26dd424

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Scripting: JavaScript T1204.001 Malicious Link: Malicious Link T1204.002 Malicious File: User Execution: Malicious File

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are associated with the execution of embedded JavaScript. An extracted JavaScript file, 'legacy_pdfkit_stage_000.js', was also flagged by ClamAV as 'Js.Exploit.Shellcode-18', further supporting the conclusion that the PDF is designed to execute malicious code. The embedded JavaScript likely serves to download and execute a 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0028_000.js` `9baedf255f6e48fc664b1ff623dc3e1fc7e6064639c7630cab5a1c80b88ff945`	pdf-javascript-stream	PDF /JS object 28 at offset 0xF9E	344 bytes
`legacy_pdfkit_stage_000.js` `3175ee26f657dd68b9985a88d1d3e935c29264e13b231bef6410bc76cab26cc4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1EC	6888 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).

Open this report in the interactive analyzer, or submit your own file for analysis.