PDF malware analysis — malicious · c8841df1239f1571

MALICIOUS

PDF

55.0 KB Created: 2010-07-06 21:04:53 Authoring application: Virtual PDF Printer - www.go2pdf.com (via Virtual PDF Printer1.01)

MD5: 3b10ef0628957d2ee34ca8c85945d052 SHA-1: 3cc0d87ddd89c3a9f2e5cf58aef2be6a42b88420 SHA-256: c8841df1239f157137b5eac01b34ee0f2550f2a3508e0ba9ad89af09f613f8eb

426 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File Execution T1204.002 Malicious File Execution: User Execution T1566 Phishing T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript that utilizes the 'exportDataObject' API, indicating an attempt to drop and execute an embedded PE payload. The critical heuristic 'CVE_2010_1240_EMBEDDED_PE_EXPORT' confirms a chain involving Adobe Reader launch and export of an embedded executable. The embedded file 'nou1.pdf' is declared as a PDF but sniffed as a Windows executable, further supporting the malicious intent. The file is also detected by ClamAV as 'Pdf.Tool.Agent-1388586'. The launch action targets 'aaa.exe' and includes command-line parameters suggesting execution within the user's environment.

Heuristics 13

Adobe Reader Launch/export embedded executable chain critical CVE likely CVE_2010_1240_EMBEDDED_PE_EXPORT

PDF combines a /Launch action with an embedded-file name tree, exportDataObject JavaScript, and embedded executable bytes. This matches the CVE-2010-1240 Launch-file abuse chain even when the Launch dictionary does not expose the stricter cmd.exe /Win shape.
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.
Embedded attachment masquerades: declared document, content is windows-executable critical PDF_EMBEDDED_FILESPEC_CONTENT_MISMATCH

An /EmbeddedFile attachment's declared filename extension or /Subtype MIME type contradicts the magic bytes of its decompressed content. The attachment is declared as a benign document or image but the bytes are an executable or executable-bearing archive. This is a deliberate deception used to hide droppers in PDF attachments and is a generic indicator of embed-and-drop weaponisation, independent of any specific CVE.
ClamAV: Pdf.Tool.Agent-1388586 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Tool.Agent-1388586
Launch action high PDF_LAUNCH

PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
/Launch action target: "aaa.exe" high PDF_LAUNCH_COMMAND

PDF /Launch action specifies an executable target with parameters '/Q /C %HOMEDRIVE%&cd %HOMEPATH%&(if exist "Desktop\\nou1.pdf" (cd "Desktop"'.
/Launch action paired with attachment-dropping JS API high PDF_LAUNCH_PLUS_DROPPER_JS

PDF combines a /Launch action with a JavaScript API call that writes or opens an attached/external resource — the canonical shape of the CVE-2010-1240 /Launch + exportDataObject family. Benign PDFs do not pair these surfaces; the combination indicates a drop-and-execute chain regardless of the specific JS API knobs or /Launch target.
Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION

PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
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
External URI info PDF_URI

PDF contains an external URL action
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.go2pdf.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`nou1.pdf` `37121ecb7c1e112b735bd21b0dfe3e526352ecb98c434c5f40e6a2a582380cdd`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x1149	114688 bytes
`javascript_obj0017_000.js` `608eca199c721532742bef5fa07c8aa2add996038efe924ab3e67a7653ddc6b3`	pdf-javascript-stream	PDF /JS object 17 at offset 0xD7ED	53 bytes

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