PDF malware analysis — malicious · 834072da451874a9

MALICIOUS

PDF

4.5 KB Created: 2010-01-24 09:34:23 Authoring application: a5f05f

MD5: 9b819cfe4c5cb1d87b7ace921a02392e SHA-1: 090f513c5f1f608930a633d1ebe20894bfadbcb2 SHA-256: 834072da451874a98bf025e501b0be33f76b59b82c06a764313c21cbfceb5d6e

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 extracted artifact 'legacy_pdfkit_stage_000.js' was flagged by ClamAV as 'Js.Exploit.Shellcode-18', suggesting it contains shellcode. This indicates the PDF is designed to exploit these vulnerabilities to execute malicious JavaScript, which likely downloads and executes 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` `e0f6508abe5043ff2e51d95b044d7e88f8aa62da1a81db1cf56920dec7a1adc3`	pdf-javascript-stream	PDF /JS object 12 at offset 0x20E	110 bytes
`javascript_obj0028_001.js` `e98b4aa28f374b546acf53a65704f0166d9243e1d309add85d5d80294942e0dd`	pdf-javascript-stream	PDF /JS object 28 at offset 0x2CE	334 bytes
`legacy_pdfkit_stage_000.js` `d3e2e5a3f9101e87758e57bfc3f3bb7c9bcaa86fa25b362d4b10c8f203dc6159`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x475	7820 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 15 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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