PDF malware analysis — malicious · cdc41214cdc5e563

MALICIOUS

PDF

44.9 KB

MD5: af077e94d2c72e5e4dc8e0f9f3f67bc4 SHA-1: 4d16036e679f83aaa8e1a11dea106abe9c0ef6cd SHA-256: cdc41214cdc5e56357f3b646f3d81325eda90eb4b7b3dff816f92156331784d9

66 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript and U3D content, triggering heuristics related to known Adobe Reader vulnerabilities. The presence of deobfuscated JavaScript streams indicates that the embedded script is designed to be executed, likely to download and execute a second-stage payload. The file's SHA256 hash is included as a primary indicator.

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` `c1b5ff130aac3af62fca14faf6f47a429f61afc2e81b304b56820c851fef2fa9`	pdf-javascript-stream	PDF /JS object 9 at offset 0x4528	450 bytes
`legacy_pdfkit_stage_000.js` `f26ea6c8c2fabf9a0b75b5114a423558d7dd018fe84edbe8613b79ee4eaad7c0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1C6D	12546 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` `cef5eafcad825098a059a6e53432d45d24187409b2d9b5fc838b86248fd1c364`	deobfuscated-js	PDF JavaScript deobfuscation pass	307619 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off00004764.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x4764	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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