MALICIOUS
316
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File
T1059.001 PowerShell
The PDF file contains critical exploit code targeting CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA heap spraying. Heuristics indicate the presence of unescape and String.fromCharCode functions, commonly used for obfuscation in exploit code. The file also contains embedded scripts and an embedded file, suggesting it acts as a dropper for further malicious activity. The ClamAV detection name 'Pdf.Exploit.Dropped-81' further supports this assessment.
Heuristics 9
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Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
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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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ClamAV: Pdf.Exploit.Dropped-81 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Dropped-81
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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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Suspicious extracted artifact high 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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String.fromCharCode medium PDF_FROMCHARCODEString.fromCharCode found — used to construct payload strings dynamically (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
Extracted artifacts 7
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
embedded_file_obj0008.bind81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777 |
pdf-embedded-file | PDF EmbeddedFile object 8 at offset 0xF89 | 84 bytes |
embedded_file_obj0009.bin24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0 |
pdf-embedded-file | PDF EmbeddedFile object 9 at offset 0x103A | 228 bytes |
embedded_file_obj0010.bin20f62d24ed4f9613534077e2b0670edc5627c98cd4d5b6c0b40dbbb17050ef5a |
pdf-embedded-file | PDF EmbeddedFile object 10 at offset 0x112E | 4476 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).
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embedded_file_obj0011.binc97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460 |
pdf-embedded-file | PDF EmbeddedFile object 11 at offset 0x1A3C | 199 bytes |
embedded_file_obj0012.bind5c0be04c46ac1f7d523d955a6ab8aa50363e08076e63efedca0b5538dd14672 |
pdf-embedded-file | PDF EmbeddedFile object 12 at offset 0x1B2E | 131 bytes |
embedded_file_obj0013.bine6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876 |
pdf-embedded-file | PDF EmbeddedFile object 13 at offset 0x1BEE | 77 bytes |
embedded_file_obj0014.bin92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a |
pdf-embedded-file | PDF EmbeddedFile object 14 at offset 0x1C95 | 56 bytes |
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