PDF malware analysis — malicious · f7bc24de6ae017a5

MALICIOUS

PDF

3.8 KB Created: 2010-02-12 06:17:01 Authoring application: yff993e5

MD5: f5bfd71b3e789fefdd01faee2c9a6681 SHA-1: 0f08c8e1a2e8be1b86def7fbf78d14e16e7652b3 SHA-256: f7bc24de6ae017a51225a9ae4a29e3fe99a0041782677daee66a72f7ab33c1b4

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 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 leveraged to execute embedded JavaScript. An extracted JavaScript file, legacy_pdfkit_stage_000.js, was identified by ClamAV as Js.Exploit.Shellcode-18, suggesting it contains shellcode or a downloader. The embedded JavaScript is likely responsible for downloading and executing 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_obj0040_000.js` `ca8ebf8498113d79e32ba1dbd8f58cb535238ce6acfd12c966e7d62087d2a519`	pdf-javascript-stream	PDF /JS object 40 at offset 0xC	1068 bytes
`legacy_pdfkit_stage_000.js` `b57fa99ed8e468611f125d8f8d9f2a60c36ecda3c62010f456d6994aa765ea35`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x453	5754 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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