PDF malware analysis — malicious · 3e5fd02c22e5732a

MALICIOUS

PDF

43.5 KB

MD5: 4d90797cf90d85aa4d082b14fd42b326 SHA-1: e2ee70cb3e4c4af69df593ba9c56481c7445ca1b SHA-256: 3e5fd02c22e5732a7b4b8892c2a538d33b1b99da7d3943b1ae40654b9940a5b8

66 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.001 Command and Scripting Interpreter: JavaScript T1566.001 Phishing: Spearphishing Attachment

The PDF file contains embedded JavaScript and U3D content, which is a known vector for exploiting vulnerabilities in Adobe Reader. The heuristics indicate a CVE-related exploit targeting the 3D parser. The embedded JavaScript streams, particularly 'legacy_pdfkit_stage_000.js' and 'deobfuscated.js', likely contain malicious code designed to be executed upon opening the PDF, potentially leading to further compromise.

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` `dfdfe0d7b73487c0abe14417ba9740f644a5b02fb0b80d89fe07512b78f60fa3`	pdf-javascript-stream	PDF /JS object 5 at offset 0x14F	478 bytes
`legacy_pdfkit_stage_000.js` `f137e197218a770885234f4eade618521d59d1c5b11aa96ca536998e4cac27b8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1CB6	12395 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` `f144eb9130cf23dfec828cc72fdb41ec8173375fd459a3248359260819c0cb0c`	deobfuscated-js	PDF JavaScript deobfuscation pass	289376 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`u3d_00_off000041e3.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x41E3	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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