PDF malware analysis — malicious · c232e1b5327b7498

MALICIOUS

PDF

6.3 KB

MD5: 5e9483b79c8791e0d03a549b72b2089a SHA-1: 20e1d344ee1331956b20a62b5fab515f8e5b8b65 SHA-256: c232e1b5327b74986f09951a44f4b484d1544bcb87583bb09bacd3c9b167981c

238 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

This PDF file contains embedded JavaScript and triggers critical heuristics related to the CVE-2009-0658 exploit, which targets Adobe Reader's JBIG2Decode filter. The exploit is designed to spray the heap and likely leads to arbitrary code execution. The presence of obfuscated JavaScript further supports the malicious intent, suggesting it's used to download and execute a secondary payload.

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` `39f2c81ecb91333a866e67a9ed6948bc49eed1d5190b7642e1581ddcabb5bd25`	pdf-javascript-stream	PDF /JS object 6 at offset 0x211	4584 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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