PDF / .2 malware analysis — malicious · 260a5ed732de931d

MALICIOUS

PDF / .2

7.0 KB Created: e1svrt Authoring application: Adsfgddfobe (via sfgasdfgsd)

MD5: 38323efff841c4e4c8a0f369398c9135 SHA-1: 7627a5aa3986587b126b917129f6b318de0756d8 SHA-256: 260a5ed732de931d833c2303a2a2a6e062677211e93cf6378fe20f11f9249a4a

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

The PDF file contains embedded JavaScript that leverages multiple critical CVE vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) related to media player and collaboration functions. The heuristics indicate that this JavaScript is hex-decoded, concatenated from info fields, and evaluated. An 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 further payload. The authoring application metadata also contains suspicious strings.

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_obj0006_000.js` `d4544942112a3c8246867b0e920b4a85fa53fd317e272dcc6b876a2b4fef557d`	pdf-javascript-stream	PDF /JS object 6 at offset 0x14A	611 bytes
`legacy_pdfkit_stage_000.js` `7ea21f42e2ae5c46ffbffc6700c0d8f6b71d7bd5ccbd8edb0dee6f68002f4135`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x363	11263 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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