PDF malware analysis — malicious · d8c229549f20f6de

MALICIOUS

PDF

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

MD5: 045dbe8826c0acd5a74a0a2d3546f6ba SHA-1: d1c016d964ac62f63f476d7f6e41bd149ed0bbde SHA-256: d8c229549f20f6de4a70d34d72361ff95e3a1f86abdf22459b603011782664c3

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659 through embedded JavaScript. The deobfuscated JavaScript artifact, 'legacy_pdfkit_stage_000.js', along with the ClamAV detection 'Js.Exploit.Shellcode-18', strongly suggests that the script's primary purpose is to download and execute a second-stage payload. The file's structure and exploit indicators point to a malicious PDF designed for initial compromise.

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` `dbcfb0e410e15b1618de45f6d68a049eab564e320ed6af34f3c5d87d8b655829`	pdf-javascript-stream	PDF /JS object 6 at offset 0xDCF	225 bytes
`javascript_obj0016_001.js` `6f42a8681b6bb6fd848ffe7d923c8ccd05251cddae13a2b201b69b452313281f`	pdf-javascript-stream	PDF /JS object 16 at offset 0xEB6	173 bytes
`javascript_obj0026_002.js` `7377ee6f9748c5a12ff5410449ce8db8a6914124f5179385f4960ea3e4bb13dc`	pdf-javascript-stream	PDF /JS object 26 at offset 0xF94	73 bytes
`legacy_pdfkit_stage_000.js` `383681df1ce7a511d3f708c3f8615c58d9fc3a2788d53a266798c1bd49df5210`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1E7	6214 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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