PDF malware analysis — malicious · 3e82dc6e7a19b245

MALICIOUS

PDF

7.2 KB

MD5: 97498c5f9ebc5afa52db7149c9e4b221 SHA-1: 0486beae01ec86c0a7ca2b1008b39b0ee4fdb4d1 SHA-256: 3e82dc6e7a19b2455e53e1c53acf8b3869190d91d4bf1cd7bdad09f2d874ac84

238 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.001 PowerShell

The PDF file contains embedded JavaScript and triggers critical heuristics related to the CVE-2009-0658 exploit, specifically a generic heap-spray targeting the JBIG2Decode filter in Adobe Reader. This indicates the file is designed to achieve arbitrary code execution. The embedded JavaScript, although obfuscated, is likely responsible for downloading and executing a secondary payload. The presence of obfuscated JavaScript and the specific exploit technique point towards a malicious downloader.

Heuristics 8

Adobe Reader JBIG2Decode generic heap-spray exploit critical CVE likely CVE_2009_0658_GENERIC_SPRAY

PDF combines JBIG2Decode image streams with JavaScript heap-spray or decoder scaffolding. This is likely CVE-2009-0658-family Adobe Reader JBIG2 exploitation, but it lacks the stricter Reader-9 version gate or decoded page-word shellcode fingerprint required by the exact rule.
JBIG2 + active content high CVE related PDF_JBIG2_ACTIVE_CONTENT

JBIG2Decode appears with JavaScript/XFA/RichMedia — a related indicator for JBIG2 parser-exploit families including CVE-2021-30860 and CVE-2009-0658, but not a unique CVE fingerprint.
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)
JBIG2Decode filter medium PDF_JBIG2

JBIG2 image decoder present — historically used in zero-click exploits
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
`javascript_obj0006_000.js` `ab8f043e37c640fdc16ca625aaeacd47ac8d3ff726c945a3b05713a1cdb0fae1`	pdf-javascript-stream	PDF /JS object 6 at offset 0x23B	5785 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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