PDF malware analysis — malicious · efae690636b85aa2

MALICIOUS

PDF

6.9 KB

MD5: 4b4b1ca879378df866605db3cab26a6e SHA-1: f0e4f31a1889f6716fc3cacdb21920e0a5575766 SHA-256: efae690636b85aa2a6802eba83666d88b4290ff9668d7844f75ac8bcaf8f5c60

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1559.001 Component Object Model

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_UNESCAPE. The embedded JavaScript stream, named 'javascript_obj0006_000.js', is the primary indicator of malicious activity. This script is likely responsible for exploiting a vulnerability within the PDF reader to achieve arbitrary code execution. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature of the file.

Heuristics 7

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` `a20646243f1afd11814005785fb0b56aad870793cec8ff1b0e95784b0ec58864`	pdf-javascript-stream	PDF /JS object 6 at offset 0x21D	5355 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.