PDF malware analysis — malicious · d67c0c26c2f41e82

MALICIOUS

PDF

45.2 KB Authoring application: cairo 1.8.0 (http://cairographics.org

MD5: 0315ee700cfee85a833b84c7ab4c0d1a SHA-1: 390abff582df6d8a87081938a1e1e28ba42d45c1 SHA-256: d67c0c26c2f41e829b3381efa0757a2f0f442891f4015c0c3812b2e28f1ed8d5

324 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The PDF file contains embedded JavaScript and a PE payload, and critical heuristics indicate a PDF launch action targeting cmd.exe. This chain of events suggests the PDF is designed to exploit CVE-2010-1240 to execute a dropped payload, likely a trojan dropper as indicated by ClamAV. The embedded file name 'Canada_Post_Notice_441.pdf' is likely a lure.

Heuristics 9

Adobe Reader Launch action command execution critical CVE exact CVE_2010_1240

PDF 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.
Launch action critical PDF_LAUNCH

PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOAD

PDF 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.
/Launch action target: cmd.exe critical PDF_LAUNCH_COMMAND

PDF /Launch action specifies an executable target with parameters '/Q /C %HOMEDRIVE%&cd %HOMEPATH%&(if exist "Desktop\\Canada_Post_Notice_441.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
ClamAV: Win.Trojan.Dropper-131 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Dropper-131
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
Embedded URL info EMBEDDED_URL

One 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://cairographics.org

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0019_000.js` `fbe6a2f480df05b9c1cdb3c7e497ab2a00d88055a8cee17585b299bf90105823`	pdf-javascript-stream	PDF /JS object 19 at offset 0xB083	71 bytes
`stream_003_off00002083.bin` `e94a9d59fc07c9817d51c927316a2286cb928e65873c5332be4f1b2ff2f218a9`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2083	56832 bytes

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