PDF malware analysis — malicious · c171512c7a003c80

MALICIOUS

PDF

5.0 KB Created: 2010-03-05 02:15:27 Authoring application: zw2fa69

MD5: 99f1a0895029c8d0686d5a4a21243fda SHA-1: d055980a213b091e5ad7ff56ae09e442ab12a76a SHA-256: c171512c7a003c8032b7a35c3c0ac4efc9d8f33c1a4d0cda2e1b62a13fd1aec8

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. The heuristics indicate that this JavaScript is used to launch a second-stage payload, as evidenced by the ClamAV detection 'Js.Exploit.Shellcode-18' and the presence of a deobfuscated JavaScript file. The document body is unreadable, but the technical indicators strongly suggest a malicious exploit delivery mechanism.

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` `a057c256b7d8f4b1e03624bd177e0ae3cc8d838bae04185f7deae8ac4830ce34`	pdf-javascript-stream	PDF /JS object 28 at offset 0x103F	335 bytes
`legacy_pdfkit_stage_000.js` `7499ea60e3f4c27b67fa617d541eaad63cca5094548eee1edd461a95c13d3978`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1EC	7253 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 15 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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