PDF malware analysis — malicious · 9cdfaa55434bfaaf

MALICIOUS

PDF

23.1 KB Created: 2010-04-17 07:22:18 Authoring application: Microsoft® Office Word 2007

MD5: 2880d85d8f5ab68a84f16323ca3530a5 SHA-1: ba6517bfe318dc3d71f99dc9544d65c4f6fefffd SHA-256: 9cdfaa55434bfaaf22a1279a16438746e916103ba62213832b7e1dd7980deb68

384 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains embedded JavaScript and a PE payload, triggering critical heuristics for PDF launch actions and embedded executables. The CVE_2010_1240 heuristic specifically indicates exploitation of a vulnerability to execute cmd.exe with provided parameters. The embedded executable was detected as Win.Trojan.Rozena-131 by ClamAV, suggesting it is a malicious payload. The PDF itself was detected as Pdf.Tool.Agent-1388586.

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\\test.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
ClamAV: Pdf.Tool.Agent-1388586 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Tool.Agent-1388586
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0020_000.js` `b1a09f919e0f5d1c1d284849c9af93bae6fd1411634dfdc491e126f9cd327f3f`	pdf-javascript-stream	PDF /JS object 20 at offset 0x57F2	53 bytes
`stream_003_off00000b43.bin` `30417026b8e439ddeecbe70eb7fdc06a5c40513940039fedf5b5d2bb14c3ada1`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xB43	37888 bytes
Detection ClamAV: Win.Trojan.Rozena-131 Obfuscation or payload: unlikely

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