PDF malware analysis — malicious · 312495ed34a1ed19

MALICIOUS

PDF

43.6 KB

MD5: d072067438563aa22839bcee814b78ed SHA-1: e5362dfad1df60d8cd01c41eb31f1eace93ef8ae SHA-256: 312495ed34a1ed198e8f34c006cbc3de3ff02c36bca95da5d5fa5954d52a1b6c

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings. The presence of U3D content and a 'syncAnnotScan' primitive suggests exploitation of PDF vulnerabilities. The extracted 'deobfuscated.js' file is likely responsible for the malicious payload delivery, although its exact function is not fully discernible from the provided evidence.

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_obj0005_000.js` `13cad8154c205beb6306190be1155bbba6aa71c0daad170f29662965290d6f84`	pdf-javascript-stream	PDF /JS object 5 at offset 0x14F	475 bytes
`legacy_pdfkit_stage_000.js` `33ea7bf6dccc020221e31fd959ffa27176144402ce00be86929b21d9d128487d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1CD8	12399 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`deobfuscated.js` `10b47da49da010b7434d5b5b5401fb2bb14ecd7a1ef903d98377713c5f69d0eb`	deobfuscated-js	PDF JavaScript deobfuscation pass	208492 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`u3d_00_off0000424f.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x424F	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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