MALICIOUS
576
Risk Score
Malware Insights
MITRE ATT&CK
T1204 Malicious Link
T1204.002 Malicious File
T1059 Command and Scripting Interpreter
T1059.003 Windows Command Shell
This PDF file contains embedded JavaScript and a critical PDF_LAUNCH heuristic firing, indicating it attempts to execute a command. Specifically, it targets CVE-2010-1240 by launching cmd.exe with parameters that suggest it will execute a secondary payload, identified by ClamAV as Win.Trojan.Swrort-4718. The embedded executable payload and the command execution chain strongly indicate a malicious intent to download and run further malware.
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-13887 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Agent-13887
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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 (if exist "%HOMEPATH%\\My Documents\\00001.pdf" (cd "%HOMEPATH%\\My Documents"' — 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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Suspicious extracted artifact critical 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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/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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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://nopsr.us/ctf2006prequal/ In PDF document text
- tcp://32.25.0.1:128In extracted file (00001.pdf)
- tcp://160.114.3.1:128In extracted file (00001.pdf)
- tcp://216.68.0.1:128In extracted file (00001.pdf)
Extracted artifacts 5
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
00001.pdf |
pdf-embedded-file | PDF EmbeddedFile object 28 at offset 0x86AB | 256512 bytes |
SHA-256: 64ecb3eedeb3a87cf964e943bf3b3e7b879689c1ffda0713941e61b4b19d44b4 |
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Detection
ClamAV:
Win.Trojan.Swrort-4718
Obfuscation or payload:
likely
actual_type=PE; declared_or_context_type=PDF; filename=00001.pdf; kind=pdf-embedded-file Static shellcode analysis recovered the Metasploit stager connect-back address: 32.25.0.1:128 (reverse/x86, public); 160.114.3.1:128 (reverse/x86, public); 216.68.0.1:128 (reverse/x86, public) Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS, SC_STR_GETPROCADDRESS Static shellcode analysis recovered API/import strings: LoadLibraryW, GetProcAddress, CreateFileW
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javascript_obj0029_000.js |
pdf-javascript-stream | PDF /JS object 29 at offset 0x25FF4 | 54 bytes |
SHA-256: c906b7b2cb915d4e64018b9c3ddb8ef1223afa08bd5daf0676a6ff7e0e96a4ac |
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Preview scriptFirst 1,000 lines of the extracted script
this.exportDataObject({ cName: "00001", nLaunch: 0 });
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icc_00_off000029fb.icc |
pdf-icc-profile | PDF ICC profile at offset 0x29FB | 1320 bytes |
SHA-256: eb03db58ff1f226c83103a11f30b5520f9b68a7ced67daa78992723e3ea0411d |
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font_00_sfnt_off00002de4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x2DE4 | 8420 bytes |
SHA-256: 12631de56f734003216fec20b9df9f25602f9d938f913c4f03f5e87a1d2bb3d9 |
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font_01_sfnt_off00004669.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x4669 | 21572 bytes |
SHA-256: a68f517baa90c8f001a07e1fbbbc2c9132b68edf8899c6c6467cce85420a90a4 |
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