PDF malware analysis — malicious · c4ca3412f7467d5b

MALICIOUS

PDF

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

MD5: 3593347f8884e43d626b8340b8f4b7cc SHA-1: bea0dd50119b7af20f728c8b638f51000fd4d30d SHA-256: c4ca3412f7467d5b87ed9c4ceff22824d1df31a727f88377bea64ffb5684db79

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 and obfuscated JavaScript. An extracted JavaScript file, legacy_pdfkit_stage_000.js, was identified as suspicious by ClamAV with the signature Js.Exploit.Shellcode-18. This suggests the primary function of the PDF is to exploit these vulnerabilities to download and execute a secondary malicious 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` `daa8624ada451e4d8acb6edc2cbae2ec46e3ec10a0caddd3d5402fc964e8bf7f`	pdf-javascript-stream	PDF /JS object 6 at offset 0xE08	205 bytes
`javascript_obj0016_001.js` `a013c301f8f4171f23af496f98a43b217d4cb47e4e17b47eda4be21c5977b13a`	pdf-javascript-stream	PDF /JS object 16 at offset 0xEDF	159 bytes
`javascript_obj0026_002.js` `f330153aafe681bc9733b4d8637c1a83ebd1d1e1dc01a1f57d39bb691a8df774`	pdf-javascript-stream	PDF /JS object 26 at offset 0xFAB	67 bytes
`legacy_pdfkit_stage_000.js` `cbd64cfddff9fada47d56645f0253b273057718c6c16f5baad9a8e23557bb27f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1BB	6417 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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