PDF malware analysis — malicious · 51d831204dd2fccf

MALICIOUS

PDF

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

MD5: 96a0053a4ff461f6ad37e6300b3e5bdd SHA-1: a2d20e92902f196e2fd35610085dbe8a063b84af SHA-256: 51d831204dd2fccf9149cebaea7a50206baea0a4b0cfbd5dbe1e01c5e9b20f83

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample 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 artifact was detected by ClamAV as Js.Exploit.Shellcode-18, confirming malicious JavaScript content. The 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `ce707d1444f6fe7a91f67a713ca77bbf1e376d485ca26af555079088467f50ca`	pdf-javascript-stream	PDF /JS object 12 at offset 0x4EF	1086 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 8 eval/decoder/string-building token(s).
`javascript_obj0028_001.js` `435e6b318ca3f42c8dc3b90bc6144aac4b3d2304026dbc8d98c8ef48a95a4e59`	pdf-javascript-stream	PDF /JS object 28 at offset 0x1B9	1639 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `6197e44a298c8497e8ea3784a95fae20c8a66e2a86c35cba44a60c98dbbde531`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x74F	36312 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 68 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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