PDF malware analysis — malicious · 9fdfae4dc862d696

MALICIOUS

PDF

3.1 KB Created: 2010-02-11 07:24:14 Authoring application: zt0b0dd

MD5: 7d0499e88f9117e5e21c4a062390510f SHA-1: f1f35a179e74fe436e2aceaaa145c5cb0ebb94fe SHA-256: 9fdfae4dc862d696aa1b300ec90d0240bb65d19d07312815b38db3aebfd9e547

198 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages known vulnerabilities (CVE-2009-0927 and CVE-2007-5659) to execute arbitrary code. Heuristics indicate that this JavaScript is designed to deobfuscate and likely execute a further stage payload, as evidenced by the ClamAV detection 'Js.Exploit.Shellcode-18' on an extracted artifact named 'legacy_pdfkit_stage_000.js'. The attack pattern is consistent with a PDF-based exploit kit aiming to deliver malware.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0028_000.js` `b3ee4b7ba08bec9e7487bda89a2d3b2da356dcb313521ad61694cc939163c5b8`	pdf-javascript-stream	PDF /JS object 28 at offset 0x88	414 bytes
`legacy_pdfkit_stage_000.js` `a5ed05998ee6c2b83a185975b507cd6d495d539ae96544639704f90442d3a634`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x374	4930 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 8 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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