PDF malware analysis — malicious · 9ff162f8fadd7a73

MALICIOUS

PDF

2.0 KB

MD5: d3cc6aed6e69047aa103ff1ba4ab5211 SHA-1: 100f85bd6c37f3a5dbacc7b8b103219a7d0df6fd SHA-256: 9ff162f8fadd7a73a2c0c665833838e6e0f772e5b96f2169a2f5437febbf8659

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_UNESCAPE. The critical CVE_2009_0927 heuristic specifically points to the exploitation of a known vulnerability in Adobe Reader. The embedded JavaScript is likely designed to download and execute a second-stage payload, although the exact functionality is obscured. The ClamAV detection further supports the malicious nature of the file.

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. (matched in decompressed stream)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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` `0c607f225eb25ce6f2acda6f7c04101849b0f27d91ac04fa4d4824cc5fe668c9`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1D1	1260 bytes
`stream_000_off000001f8.js` `0248f7f57d4c187dc36ea1cf6bb3fe283c057ece36d436d3359eeb1f5e27cf49`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1F8	4809 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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