PDF malware analysis — malicious · e2f3ed750404626e

MALICIOUS

PDF

4.1 KB Created: 2010-01-35 62:12:26 Authoring application: Adobe

MD5: 6370ebebf776e7cf0ec30a1e0a60b8e1 SHA-1: 54f2d7d711808672f6030b985c18ac7e013c364c SHA-256: e2f3ed750404626e68b91ebe8c8b07954bedff250def61599306b8f3e41142fe

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 through embedded JavaScript, which is further confirmed by the 'PDF_JAVASCRIPT' and 'PDF_JS' firings. 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 'Js.Exploit.Shellcode-18' reinforces 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `2cbbbfb8f64c2053a85fb5696aa40ecb74f24c841fd197eb0f41ed1c851e753d`	pdf-javascript-stream	PDF /JS object 32 at offset 0x2A2	182 bytes
`javascript_obj0034_001.js` `521bb1fa5f10796f5b89c39b16e75fd519f4661bd6553cb0cc96b23056cfc8ff`	pdf-javascript-stream	PDF /JS object 34 at offset 0x126	120 bytes
`javascript_obj0036_002.js` `3948256f477dabd077301ed8e66612836eb7e5e8227ebc028dfd3e2ba326f658`	pdf-javascript-stream	PDF /JS object 36 at offset 0xD97	176 bytes
`legacy_pdfkit_stage_000.js` `69bfcb2ccd6dc70f77f811451472607a14c2497da2417717e0895d6e050a3261`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x3BE	6034 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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