Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80b89447cb518ea…

MALICIOUS

PDF

237.6 KB Created: 2009-11-06 08:22:50 +01:00 Authoring application: PScript5.dll Version 5.2.2 (via Acrobat Distiller 7.0.5 (Windows))
MD5: 31bcb78f7c03410e3797b4d5717cd7d7 SHA-1: f00a70fc7b89a9ae09a30c199372f606ea7e1455 SHA-256: e80b89447cb518eaa1a01a3c7a6d7ff28c37bb60b76fb95134c73a2cf476fe8c
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 embedded JavaScript and a critical heuristic firing for PDF_LAUNCH_COMMAND indicates that cmd.exe is executed with specific parameters. This execution is part of a chain exploiting CVE-2010-1240, leading to the launch of an embedded PE payload. ClamAV detections on both the PDF and the extracted payload (Win.Trojan.Rozena-131) confirm its malicious nature. The embedded executable is likely a downloader or dropper for further malicious activity.

Heuristics 10

  • 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\\Whitepaper.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
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0083_000.js
4f52907479f4ef9c8b2b8fbe36f26a0f97a16c75bb9d179084a84661d61571af		 pdf-javascript-stream PDF /JS object 83 at offset 0x3B22E 59 bytes
stream_015_off000155cb.bin
99c1287736273511c7682c0e4f70eded84ec2f94cbc231c891107fe58ecd3b75		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x155CB 11268 bytes
stream_030_off00036531.bin
6f73e88983c3bd8db79d9e6ae978f2b8873ff6caeb01adff025b9a0e14c2d032		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36531 37888 bytes
Detection
ClamAV: Win.Trojan.Rozena-131
Obfuscation or payload: unlikely
icc_00_off00004095.icc
2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e		 pdf-icc-profile PDF ICC profile at offset 0x4095 3144 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.