PDF malware analysis — malicious · 934b24cd3915f2d4

MALICIOUS

PDF

39.0 KB

MD5: 74ef461d09d9cc48255142d38342f013 SHA-1: 72e1586b7f3735cebe91335d7769d7bc2cb1c290 SHA-256: 934b24cd3915f2d4775e8ce93c535f4ecb200848cb1bb5ff616e168e81f1edbe

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and a U3D (3D content) stream, which is flagged as a potential indicator for Adobe Reader vulnerabilities. ClamAV detected this file as Heuristics.PDF.ObfuscatedNameObject, indicating malicious intent. The embedded JavaScript is likely responsible for exploiting the U3D content to achieve code execution, potentially leading to the download and execution of 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
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.
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed stream)
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `11b03694c4e705ab29873cc5e2c55342ee498b376ac2dc5f05ce17018ef44c38`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A4	264 bytes
`deobfuscated.js` `7a1b9046674945f3db9bb23548d390b5d2e2156c8fa987f11c2497e52e8f07fd`	deobfuscated-js	PDF JavaScript deobfuscation pass	138840 bytes
`u3d_00_off00002a5c.bin` `7bb66b3ac4ff7a80e871a57eddfaf3240dacbc930966841c0a5effb6b48b28f6`	pdf-3d-stream	PDF U3D 3D stream at offset 0x2A5C	28790 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.97, consistent with packed or encrypted content.

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