PDF malware analysis — malicious · 267b66677e456274

MALICIOUS

PDF

4.5 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe

MD5: 5b040eff34a34f76153d69d22f289bd5 SHA-1: 9e4a75781b20145237e67530786213e5c714d060 SHA-256: 267b66677e4562742b92164e44d02eaa4327dfe694ba781a6a23db974b3f876d

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 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 through embedded JavaScript, which is further confirmed by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics. An extracted JavaScript file, 'legacy_pdfkit_stage_000.js', was flagged by ClamAV as 'Js.Exploit.Shellcode-18', suggesting it contains shellcode. The overall attack pattern points to a malicious PDF designed to exploit these vulnerabilities and likely download or execute a secondary 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `276e36a55b8b8b90e500ca23b1db0ad3349aae26dd725205c53f5ae06f092480`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC3F	180 bytes
`javascript_obj0016_001.js` `f38e7407daab764761dc53f00557ccccc5fc0e5c0c45d720437623302c1725b4`	pdf-javascript-stream	PDF /JS object 16 at offset 0xD18	473 bytes
`javascript_obj0026_002.js` `c85534cb505fa9610d2f8e37963ef9132973ef99692c2452958b2f761ac42341`	pdf-javascript-stream	PDF /JS object 26 at offset 0xE93	133 bytes
`legacy_pdfkit_stage_000.js` `aa8b5e7561445a0bd213a2ce570e37374c0fc05cfd1512f61608270ba80e8a7d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1E7	6424 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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