PDF malware analysis — malicious · a5279fae55bd3f49

MALICIOUS

PDF

3.4 KB Created: 2010-02-12 08:46:30 Authoring application: a6910d

MD5: 81d3261dd93d8ceae80712baae718879 SHA-1: d1fe027b132421ff8e72e3a6928213684e3e92e7 SHA-256: a5279fae55bd3f49de09b21d5f5e05673ba369931086c96eb46eff46d59a030e

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The 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. An extracted JavaScript file, 'legacy_pdfkit_stage_000.js', was identified as suspicious and contained obfuscated script, suggesting it's designed to download and execute a secondary payload. The ClamAV detection of 'Js.Exploit.Shellcode-18' further supports the malicious nature of the embedded script.

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_obj0011_000.js` `f7fda5f2817f80d301e90d43face082a8bacc378eb6be5a6eb16322e7ad5397c`	pdf-javascript-stream	PDF /JS object 11 at offset 0xCB	227 bytes
`legacy_pdfkit_stage_000.js` `b0b9e739e10021c5e64478030771453023d30dc76a76b81404336fa85d8a3458`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x316	6290 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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