MALICIOUS
388
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious File
T1566.002 Spearphishing Attachment
T1059.003 Windows Command Shell
This PDF file contains a critical PDF_LAUNCH heuristic firing, indicating a launch action targeting cmd.exe with specific parameters. This action is part of a chain that exploits CVE-2010-1240 to execute an embedded Windows executable payload. The PDF also contains embedded JavaScript and is flagged as encrypted with JavaScript, suggesting an attempt to hide the malicious content. The presence of an embedded PE payload and the ClamAV detection further confirm its malicious nature. The specific command executed is: cmd.exe /Q /C %HOMEDRIVE%&cd %HOMEPATH%&(if exist "Desktop\contract.pdf" (cd "Desktop"
Heuristics 11
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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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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\\contract.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
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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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Encrypted PDF carries /JavaScript — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JSPDF declares /Encrypt and also references an executable trigger (/JavaScript). Document encryption hides the JavaScript body and stream contents from static scanners — combined with auto-execution indicators this is a known evasion pattern used to deliver weaponised JavaScript that the analyst cannot inspect without the decryption key.
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Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LUREPDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 108 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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JavaScript action low 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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PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILEDThe cross-check parser (pdfminer.six) failed on this file: PDF differential parser exited 1. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
javascript_obj0167_000.jsb7c28d42efa50db56162fefde75f5b9407cbbdf50d0ebe41535df38466ae96fe |
pdf-javascript-stream | PDF /JS object 167 at offset 0x1AD8E | 57 bytes |
stream_001_off00016022.bin0ce019a6773c832f8b55e34ff0da1d7aac4ba91c51b569cfa25deab207d75fb8 |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x16022 | 37888 bytes |
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