PDF malware analysis — malicious · 9d81cd8db69e81b4

MALICIOUS

PDF

44.1 KB

MD5: 258f5447450971144f0ee6f8e511c31c SHA-1: 56175e6a1b3eadff08b3d3438caa47fe4cb60430 SHA-256: 9d81cd8db69e81b4e80d0df5754363ced2e900dcadfdcc26c9c9319dfcd03b01

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1559.001 Component Object Model

The PDF file contains embedded JavaScript and 3D content, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_U3D_CVE_RELATED. The presence of deobfuscated JavaScript files suggests the script is designed to perform malicious actions, such as downloading and executing further payloads. The U3D content is also flagged as potentially related to known exploits.

Heuristics 5

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.
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `9eec12b326e4b023d726ef1aacd937cccb1c52c58f137c96b64f6ef7b15bdb43`	pdf-javascript-stream	PDF /JS object 9 at offset 0x41F0	449 bytes
`legacy_pdfkit_stage_000.js` `3fb0a313bb67082c004f2f5d48bd51a6992040f5d20fc4d775873716e7519cab`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1B1F	12125 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`deobfuscated.js` `11017802c8d65e308d331a88e0d59ad5be0eeadcc1e04d1ba488ff50c095f3a4`	deobfuscated-js	PDF JavaScript deobfuscation pass	222772 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off00004430.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x4430	28021 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.79, consistent with packed or encrypted content.

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