MALICIOUS
208
Risk Score
Malware Insights
MITRE ATT&CK
T1204 Malicious Link
T1059 Command and Scripting Interpreter
T1059.001 PowerShell
T1059.007 JavaScript
The PDF sample exhibits multiple high-severity heuristic firings related to XFA forms and embedded script payloads, strongly indicating an exploit attempt. The 'PDF_XFA_HEAP_SPRAY' and 'PDF_XFA_SCRIPT' firings suggest the use of JavaScript within the XFA form to execute arbitrary code. The presence of an embedded file, specifically 'embedded_file_obj0006.bin', further supports the likelihood of a dropper or exploit stage. While no specific URLs or domains were extracted, the overall pattern points to a malicious PDF designed to compromise the user's system.
Machine Learning
- Nyx PDF Classifier malicious score 0.9999
Heuristics 7
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XFA form contains risky executable script high PDF_XFA_SCRIPTPDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
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XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAYPDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
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unescape() call high PDF_UNESCAPEunescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOADPDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
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Embedded file low PDF_EMBEDDEDPDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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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.
Extracted artifacts 7
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
embedded_file_obj0012.bind81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777 |
pdf-embedded-file | PDF EmbeddedFile object 12 at offset 0x8F4 | 84 bytes |
embedded_file_obj0014.bin24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0 |
pdf-embedded-file | PDF EmbeddedFile object 14 at offset 0x9A6 | 228 bytes |
embedded_file_obj0011.binc97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460 |
pdf-embedded-file | PDF EmbeddedFile object 11 at offset 0xA97 | 199 bytes |
embedded_file_obj0017.binfb6603ab87ba5f4c12c03429ff897c46030f6b021ac73047fe401e685c3745ea |
pdf-embedded-file | PDF EmbeddedFile object 17 at offset 0xB88 | 119 bytes |
embedded_file_obj0010.bine6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876 |
pdf-embedded-file | PDF EmbeddedFile object 10 at offset 0xC3F | 77 bytes |
embedded_file_obj0007.bin92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a |
pdf-embedded-file | PDF EmbeddedFile object 7 at offset 0xCE5 | 56 bytes |
embedded_file_obj0006.bin740fbb210403daec9914c8189a35cf1802611012745a35af50602dd4b1ce229c |
pdf-embedded-file | PDF EmbeddedFile object 6 at offset 0x1020 | 22581 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
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