PDF malware analysis — malicious · f2dc926b3bcc4d3f

MALICIOUS

PDF

46.0 KB Created: 2007-11-29 12:43:20 +01:00 Authoring application: PDFCreator Version 0.9.0 (via GPL Ghostscript 8.50)

MD5: 18948fc42bf8cd0b56f27c3a2d08e3d0 SHA-1: 181f6d867c4513b4ddb37ec54590a098c97def2d SHA-256: f2dc926b3bcc4d3f2b43d212a733f62aa84b586a1a68a428ac89c9a9582bc686

384 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains a critical PDF_LAUNCH heuristic firing, indicating it attempts to execute cmd.exe. This is further supported by the CVE_2010_1240 detection, which specifically flags the use of a launch action to execute cmd.exe with shell parameters. An embedded PE payload was also extracted, identified by ClamAV as Win.Trojan.Rozena-131, suggesting the primary purpose is to download and execute a malicious executable.

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\\MSAPIFPH.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0036_000.js` `da8f61d9ea790df8a04cef8e9e654188b03028cf7e8985c18fcb773bf5135b32`	pdf-javascript-stream	PDF /JS object 36 at offset 0xB40E	57 bytes
`stream_006_off0000671b.bin` `bcf0c0866de8fb5f4199fec510378c0a78821cb3eca98f1a56d3cb396005ffd1`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x671B	37888 bytes
Detection ClamAV: Win.Trojan.Rozena-131 Obfuscation or payload: unlikely
`font_00_sfnt_off0000503c.bin` `5b8e477ec7bd6fc5c90fb50d18a09a61262a5912674b524a812db8ebcb6299f1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x503C	9728 bytes

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