PDF malware analysis — malicious · 90eed2bf6a604c95

MALICIOUS

PDF

7.1 KB

MD5: 738ad4a99d2e702e1e2fb08c4bcace8b SHA-1: 998cab93ce35df146be0e73db73a2b9213b96b71 SHA-256: 90eed2bf6a604c9503566d2b734fa7c26c46e80a74175321dc2c96e8c6762bd0

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, which targets Adobe Reader's JBIG2Decode filter. This indicates the file is designed to achieve arbitrary code execution upon opening in a vulnerable reader. The embedded JavaScript, although not fully detailed here, is a common mechanism for initiating exploit chains. The ClamAV detection further confirms its malicious nature.

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: Pdf.Exploit.Agent-11732 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-11732
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` `f7459a9f05e44fbbcb47c7707201a54b4b532ea41b5b0bb552a6df7cc037c00e`	pdf-javascript-stream	PDF /JS object 6 at offset 0x207	5707 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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