PDF malware analysis — malicious · 1b2f719dc9eb20af

MALICIOUS

PDF

4.9 KB Created: 2010-02-12 06:51:03 Authoring application: y9957db6226b

MD5: 9b870f428ae90f857050585df9a06d93 SHA-1: d86e88521734e6be6281c9389901af8384d2613c SHA-256: 1b2f719dc9eb20afc9515d48e1253c7a75271d278decc031e008ad15fef9d5de

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are leveraged to execute embedded JavaScript. The extracted artifact 'legacy_pdfkit_stage_000.js' was detected by ClamAV as 'Js.Exploit.Shellcode-18', suggesting it is a malicious script designed to download and execute a second-stage payload. The PDF structure and embedded JavaScript point towards a common exploit kit delivery mechanism.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0004_000.js` `71ed97071c5fc99fea5f426cfa0459bea0f53c880bb9dfa2fee31b6a3fc099fd`	pdf-javascript-stream	PDF /JS object 4 at offset 0x101D	652 bytes
`legacy_pdfkit_stage_000.js` `e95370c1c05a59892cd33297b7f9397c868a0887af53fe37d429fe3f5b7a1ee9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E8	5754 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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