PDF malware analysis — malicious · 8b889095ec57b3f2

MALICIOUS

PDF

7.4 KB

MD5: 1c7fabb80f2ea2516c8579a723351287 SHA-1: a4c9c633ed8d41bc5f2f6eeb1bd4dd9d5598a270 SHA-256: 8b889095ec57b3f264595709a5605dc2e7e602d11690c411bbb5a8be5240894c

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file exhibits multiple high and critical heuristic firings related to JavaScript and obfuscated content, including a ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject'. An embedded JavaScript file, 'javascript_obj0006_000.js', was extracted. The presence of these indicators suggests the document is designed to execute malicious JavaScript, likely for downloading further payloads or exploiting vulnerabilities. The exact intent of the script is unclear due to obfuscation, but its presence is a strong indicator of malicious activity.

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` `a6e232d9b1d4ff4b307908d36e8abfb79bb168dfcf03bdde61ab54442036d59e`	pdf-javascript-stream	PDF /JS object 6 at offset 0x24F	5990 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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