PDF malware analysis — malicious · 0dbaaeb1bbaccdc9

MALICIOUS

PDF

3.8 KB

MD5: c287eec02a886711853ea6eacc7fb071 SHA-1: 1407f558d41991412f502dc27df70513116b6be5 SHA-256: 0dbaaeb1bbaccdc94b87b32c997f4970c090b400d242b788db53acbcbf5b9f72

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that utilizes eval() and String.fromCharCode() functions, indicating obfuscation and potential exploit execution. The JavaScript appears to be a downloader, attempting to fetch and run a second-stage payload. The presence of U3D content related to Adobe Reader 3D parser CVE-family indicators further suggests exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 7

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.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `774d85f2754a4b4beffe418ac1066d581b10905a01c4c353af02a4ab36bb0b04`	pdf-javascript-stream	PDF /JS object 5 at offset 0x10D	13025 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`u3d_00_off00000c74.bin` `ff5a9c8be4ea5f95aad6bf628c0c722680a378131b2902f434e3c654deea1d60`	pdf-3d-stream	PDF U3D 3D stream at offset 0xC74	468 bytes

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