PDF / .PHP malware analysis — malicious · 798ab924f655f83d

MALICIOUS

PDF / .PHP

5.9 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe (via Notepad)

MD5: 88a0a95de4c2c93d81b3a3d8fc71a20c SHA-1: 99c90631e6e169f98dd133606d0f9cbb4f9ac99a SHA-256: 798ab924f655f83d75b034e4b5927851554ac6be3ca3232c8793be791ea5af88

198 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 User Execution: Malicious Link T1071.001 Web Protocols: HTTP

The PDF file contains embedded JavaScript that exploits CVE-2009-0927 and CVE-2007-5659. The heuristics indicate that this JavaScript is designed to download and execute a second-stage payload, as evidenced by the ClamAV detection 'Js.Exploit.Shellcode-18' and the extracted artifact 'legacy_pdfkit_stage_000.js'. The file's metadata suggests it was authored using Adobe tools but opened with Notepad, which is unusual.

Heuristics 6

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`legacy_pdfkit_stage_000.js` `5ffdd0cdbe901399f9a37b50d6eb8f7b7659a293da8cbc8823334e4dc37cf3b6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x18D	5095 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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