PDF malware analysis — malicious · b8499d9eb5a92413

MALICIOUS

PDF

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

MD5: 2b04c83ccb4a57b8ad2a94c5a8710112 SHA-1: 089efd0bc4994530222c25302647532d05c7b88b SHA-256: b8499d9eb5a92413262ec5bc0782606b475e7a6ecb8ebd8319373cf2706d7b2f

258 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1059.001 PowerShell

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659 through embedded JavaScript. An extracted artifact, legacy_pdfkit_stage_000.js, was detected by ClamAV as Js.Exploit.Shellcode-18. This suggests the PDF is designed to exploit these vulnerabilities to download and execute 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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `43c10972eb6a93562b610779432b97ba6ce643d83fad63e436afa680b7f4992d`	pdf-javascript-stream	PDF /JS object 32 at offset 0x2C1	337 bytes
`javascript_obj0034_001.js` `1d7a64a099b01a4a6e3c8a8b3502d87eb2ba451f02a6351eb674aaa5e8cefd63`	pdf-javascript-stream	PDF /JS object 34 at offset 0x126	253 bytes
`javascript_obj0036_002.js` `1a422505730949957829369ae1e0edf593f29d4604685d18e7debbdad42dd71a`	pdf-javascript-stream	PDF /JS object 36 at offset 0xDE2	388 bytes
`javascript_obj0078_003.js` `e174ec6003c02775bffdb28669fb4e307d57a72d2604c43dbace1d4cdd6d0ee2`	pdf-javascript-stream	PDF /JS object 78 at offset 0xD5C	105 bytes
`legacy_pdfkit_stage_000.js` `69bfcb2ccd6dc70f77f811451472607a14c2497da2417717e0895d6e050a3261`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x3EE	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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