MALICIOUS
576
Risk Score
Machine Learning
- Nyx PDF Classifier malicious score 0.9979
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.Tool.Agent-1388586 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Tool.Agent-1388586
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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\\Resume.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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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://www.zeustech.net/ Referenced by PDF JavaScript
- http://]hostname[:port]/pathIn extracted file (Resume.pdf)
- tcp://94.156.250.190:3884In extracted file (Resume.pdf)
- http://www.apache.org/Referenced by PDF JavaScript
- http://crl.microsoft.com/pki/crl/products/MicrosoftTimeStampPCA.crl0XIn extracted file (stream_017_off000328d1.bin)
- http://www.microsoft.com/pki/certs/MicrosoftTimeStampPCA.crt0In extracted file (stream_017_off000328d1.bin)
- http://www.microsoft.com/pkiops/crl/MicCodSigPCA2011_2011-07-08.crl0aIn extracted file (stream_017_off000328d1.bin)
- http://www.microsoft.com/pkiops/certs/MicCodSigPCA2011_2011-07-08.crt0In extracted file (stream_017_off000328d1.bin)
- http://crl.microsoft.com/pki/crl/products/microsoftrootcert.crl0TIn extracted file (stream_017_off000328d1.bin)
- http://www.microsoft.com/pki/certs/MicrosoftRootCert.crt0In extracted file (stream_017_off000328d1.bin)
- http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl0^In extracted file (stream_017_off000328d1.bin)
- http://www.microsoft.com/pki/certs/MicRooCerAut2011_2011_03_22.crt0��In extracted file (stream_017_off000328d1.bin)
- http://www.microsoft.com/pkiops/docs/primarycps.htm0@In extracted file (stream_017_off000328d1.bin)
- http://www.microsoft.com/TypographyIn extracted file (stream_017_off000328d1.bin)
- http://en.wikipedia.org/wiki/MIT_LicenseIn extracted file (font_00_sfnt_off00009e31.bin)
- http://www.microsoft.com/typography/fonts/In extracted file (font_02_sfnt_off0002daa2.bin)
- http://www.monotype.com/html/mtname/ms_symbol.htmlhttp://www.monotype.com/html/mtname/ms_welcome.htmlMicrosoftIn extracted file (font_05_sfnt_off0003d0b5.bin)
- http://www.monotype.com/html/type/license.htmlIn extracted file (font_05_sfnt_off0003d0b5.bin)
- http://www.microsoft.com/Typography/0In extracted file (font_05_sfnt_off0003d0b5.bin)
Extracted artifacts 8
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
Resume.pdf |
pdf-embedded-file | PDF EmbeddedFile object 324 at offset 0x42336 | 73802 bytes |
SHA-256: 6a50685eeab6adeb2348035aa408f2025fd69f8fe56ef3d3f402a0140b716ba8 |
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Detection
ClamAV:
Win.Trojan.Swrort-5710536-0
Obfuscation or payload:
likely
actual_type=PE; declared_or_context_type=PDF; filename=Resume.pdf; kind=pdf-embedded-file Static shellcode analysis recovered the Metasploit stager connect-back address: 94.156.250.190:3884 (reverse/x86, public) Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS, SC_PUSH_STRING, SC_STR_GETPROCADDRESS Static shellcode analysis recovered API/import strings: kernel32.dll, advapi32.dll, KERNEL32.DLL, ADVAPI32.DLL, LoadLibraryA, GetProcAddress
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javascript_obj0325_000.js |
pdf-javascript-stream | PDF /JS object 325 at offset 0x4CFDB | 55 bytes |
SHA-256: df4d9594c2c8e0b11b842a092beeb1e82b33667b8cf8ac2293922ed84ca2d2f7 |
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Preview scriptFirst 1,000 lines of the extracted script
this.exportDataObject({ cName: "Resume", nLaunch: 0 });
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stream_017_off000328d1.bin |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x328D1 | 57944 bytes |
SHA-256: 430a6230c9fed0a0950fe655e77207c3c42bf7bb179fd106cb3e77db3c6a0cda |
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font_00_sfnt_off00009e31.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9E31 | 344164 bytes |
SHA-256: de65c2ba0ec052db1e7931a4d928d6140348445144693a79871f2ece269d7e5b |
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font_01_sfnt_off0001b111.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1B111 | 359868 bytes |
SHA-256: 7f9d5ff811d9ee4fe0cd9c9c5803a998588318ff5eefdc0221a9c49846a01bb2 |
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font_02_sfnt_off0002daa2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x2DAA2 | 59296 bytes |
SHA-256: e641387f5fd18b5ca6056b97b70c809d3bcf0c56a9dd5a3ffb1ff9e3112848e4 |
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font_04_sfnt_off000381f5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x381F5 | 53148 bytes |
SHA-256: 2f2ab3177a18da6fb1459fc73afbcf5f1be4e385df014d21c8baaf339a09888c |
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font_05_sfnt_off0003d0b5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x3D0B5 | 25228 bytes |
SHA-256: b1c2362109b3c1555dd5946549cada931b8066060cb7036e6b0b500de41c44e8 |
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