PDF malware analysis — malicious · cf48e859fe1ec3e2

MALICIOUS

PDF

4.8 KB Created: 2010-03-05 02:31:36 Authoring application: zwebe35

MD5: 03641b8695a06c9f6efec81fb4053700 SHA-1: ec0e01664d4e2ecb42e359baa9f4751630f589fb SHA-256: cf48e859fe1ec3e2246c84234909c9cdbbc29232c4536c28d2293fc77a75dc8d

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits multiple known vulnerabilities including CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. Static analysis detected a suspicious JavaScript artifact named 'legacy_pdfkit_stage_000.js' which was flagged by ClamAV with the signature 'Js.Exploit.Shellcode-18'. This indicates the script is designed 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` `4d21a5111c06599fb66df72adf4a3366654d514fdb9e0544791032e42a118224`	pdf-javascript-stream	PDF /JS object 28 at offset 0xF7D	338 bytes
`legacy_pdfkit_stage_000.js` `cc62e7799b5409a3441d39ae923f701da480725fe3568a462ca92969ecbcc0d9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1EC	6869 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 13 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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