PDF malware analysis — malicious · b53d04cc0ca7f8b5

MALICIOUS

PDF

7.7 KB

MD5: d0a2c2746bcd5cc93141e29b0efb39b4 SHA-1: 92b4a0e59d342a170b03a9e2b824c1dead3de743 SHA-256: b53d04cc0ca7f8b5ba037b80d28762834cd7e4b1eefe9f74de01d09f4940b843

268 Risk Score

Malware Insights

MITRE ATT&CK

T1190 Exploit Public-Facing Application

This PDF file contains embedded JavaScript and exploits the CVE-2009-0658 vulnerability, which is known to target Adobe Reader. The critical heuristic firings indicate a heap-spray exploit designed to achieve arbitrary code execution. The embedded JavaScript, though obfuscated, is likely responsible for downloading and executing a secondary payload, a common technique for malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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` `a475fccbadaf81cca7447e6f646b6a4cdca3bcbd2174e87aabc5a981f83e0e04`	pdf-javascript-stream	PDF /JS object 6 at offset 0x228	6305 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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