PDF malware analysis — malicious · 27b540c5f12f1873

MALICIOUS

PDF

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

MD5: 628451ccc09fbfd51a053528b3d15fb0 SHA-1: fd65528009260f5a8c071d5f37a7cbf42e71081e SHA-256: 27b540c5f12f187379cabe5340aeccd85937eb5af1419f3860628fbce3d8865a

198 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF document contains embedded JavaScript that exploits CVE-2009-0927 and CVE-2007-5659 vulnerabilities in Adobe Reader. The heuristic firings indicate that the JavaScript is designed to execute shellcode, as confirmed by ClamAV detection of 'Js.Exploit.Shellcode-18' in an extracted artifact named 'legacy_pdfkit_stage_000.js'. The primary intent appears to be the download and execution of a secondary payload.

Heuristics 6

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_obj0006_000.js` `69b45b1faf9e1f291625b912a237de0b99c6eb6d93e7a34724db6a98caa3d603`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1377	139 bytes
`javascript_obj0016_001.js` `9cf0dd727a3fa0940168bc0e98a099234d3a05be8da54ac1765cd283452f1685`	pdf-javascript-stream	PDF /JS object 16 at offset 0x1443	184 bytes
`legacy_pdfkit_stage_000.js` `f8c613924c23659e01168dde249c10ad7e8d434a5845dc51c9968e2976c786ce`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1BB	4861 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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