PDF malware analysis — malicious · e296a53309d73969

MALICIOUS

PDF

41.8 KB

MD5: a7af26cb512846ca71c9de98b4448e8f SHA-1: 37dfbb0aa1d15e94e039725d515b1bcc108eb72b SHA-256: e296a53309d73969a79cbfe7d5f072259c048fbff0c0bebd0e93dfc5ce48db17

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF file contains embedded JavaScript and a U3D 3D content stream, which is flagged as a CVE-related indicator. The embedded JavaScript is likely responsible for exploiting the U3D parser vulnerability in Adobe Reader. The deobfuscated JavaScript indicates it attempts to download a file from a specific URL, which is highly suspicious and suggests a downloader or dropper functionality. The ClamAV heuristic further confirms the malicious nature of the file.

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` `7c1c43977a3c747b24eff51c7ac5a998459a9a60860aee80322bb6898cde3bf1`	deobfuscated-js	PDF JavaScript deobfuscation pass	143456 bytes
`u3d_00_off00002cac.bin` `ec625d112f6fc36093fc5330d4d39b456d30bfb40823594b2eeedbee3b1b2937`	pdf-3d-stream	PDF U3D 3D stream at offset 0x2CAC	31039 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.94, consistent with packed or encrypted content.

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