PDF malware analysis — malicious · a1ade0f4555ea7e2

MALICIOUS

PDF

16.5 KB Created: 2010-01-01 07:27:45 Authoring application: Fexaxououazobb

MD5: 1a975684ab7047703b47b8663df663d2 SHA-1: 7fbfee22184de896b82406f69f167acc920f6a35 SHA-256: a1ade0f4555ea7e2b42da7dbb27d008efe0d1761aff6aa456377597f706dce03

318 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The sample is a PDF file that leverages multiple critical vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) to execute embedded JavaScript. ClamAV detections indicate it functions as a dropper, and an extracted JavaScript artifact was also flagged as malicious shellcode. The embedded JavaScript is responsible for downloading and executing a second-stage payload.

Heuristics 8

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: Pdf.Dropper.Agent-7288576-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7288576-0
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `05d99ebdbd0b6b4bcf93e824a382e50cbc439dc6d271891bdde5351cfd2a29d9`	pdf-javascript-stream	PDF /JS object 12 at offset 0x4D9	786 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`javascript_obj0028_001.js` `4f21f61ba6326cef2c05fed8206ff2bc70cde72bbb36a15ee71784df21bc0e1a`	pdf-javascript-stream	PDF /JS object 28 at offset 0x1B9	1573 bytes
`legacy_pdfkit_stage_000.js` `b66e78aa05b10e9da03be6fc76a4b00dff85f793b63c5fc3641379bcb3dab8d9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x6F2	30750 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 104 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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