PDF malware analysis — malicious · 0e78d7bcb142ffe4

MALICIOUS

PDF

5.0 KB

MD5: 4d65d6de227dd78ccdfd48daba2a2395 SHA-1: abd5bb52133382501a1ebbd57e341e568666c652 SHA-256: 0e78d7bcb142ffe482780766f3380da4c9a4b8f5607bf2bf2be5a96872a77b46

248 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains obfuscated JavaScript that utilizes the unescape function, a common indicator of exploit code. Heuristics indicate a PDF JavaScript exploit cluster and a U3D CVE-related vulnerability. The JavaScript is designed to download and execute a second-stage payload, as suggested by the exploit cluster and the presence of obfuscated code.

Machine Learning

Nyx PDF Classifier malicious score 0.9958

Heuristics 7

U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
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)
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_obj0001_000.js` `223d15415bb21def123927d937b9f4816b5ad4b4cdca5312d9a27caeb642284b`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	3147 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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