PDF malware analysis — malicious · 9b907b3b5f5f96d1

MALICIOUS

PDF

5.6 KB

MD5: 31de830d95bbcd0b564611e6f7026df9 SHA-1: a582d713d399e4c361124ad5c39d31b13d017903 SHA-256: 9b907b3b5f5f96d1158d3e00cc7117bc3af563d1dd9843e169a5bfc2d4ac51c3

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded JavaScript streams, with one stream being particularly large and obfuscated. The presence of `unescape()` calls and U3D content related to CVEs indicates a high likelihood of exploit execution. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

Heuristics 6

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.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `e895e7f36d452e9692adfc43a2bd0c11ca097354d630292cdf3fc42e5dbc82c5`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	3647 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`javascript_obj0002_001.js` `53ef3e86395c29047481d41061937b32759780f8b45be9739a0a576f50df45b1`	pdf-javascript-stream	PDF /JS object 2 at offset 0x1020	58 bytes

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