PDF malware analysis — malicious · dcd3fdf1774bcdb8

MALICIOUS

PDF

4.8 KB Created: 2010-03-10 12:06:29 Authoring application: zw49662

MD5: 06c5516c722234c2069ed0ed905c3427 SHA-1: 497568193f22aa3f80f6ed0a70238ef2bb656bb3 SHA-256: dcd3fdf1774bcdb85af4c42f269a824d3f0283dc29ca9c27bb3b4fab064ceef2

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

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. The extracted JavaScript artifact, 'legacy_pdfkit_stage_000.js', was detected by ClamAV as 'Js.Exploit.Shellcode-18', suggesting it is a malicious exploit script. The primary function of this script appears to be downloading and executing a second-stage payload, as indicated by the exploit shellcode detection.

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` `a0c69853a1438a3cb8bd6f2df29af081731edc6121900065397380568f90fb6b`	pdf-javascript-stream	PDF /JS object 28 at offset 0xF9B	326 bytes
`legacy_pdfkit_stage_000.js` `0edf9fb5a9412896e7cbae00c362324d699beae099f62a1babd83995ab7807ea`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1EC	7115 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 14 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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