Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d1ccb98207953a4…

MALICIOUS

PDF

85.0 KB Created: 2010-06-13 15:23:54 +02:00 Authoring application: DOC1/PCE Version 4.3p2030 (via Artifex Ghostscript 8.62)
MD5: 6b055f8d7487189992577d676a1f4ad1 SHA-1: 00fbac742e729b4612f2b74c1c31e293ec199e53 SHA-256: 7d1ccb98207953a4896aae02800b5d770031dd57a27779c8bf821c417efc738e
516 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains JavaScript that triggers a launch action, executing cmd.exe. This command is designed to execute an embedded Windows executable payload, which is disguised as a PDF file named 'vodafone.pdf'. The embedded executable was detected by ClamAV as Win.Trojan.Rozena-131, indicating a malicious dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 12

  • 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\\vodafone.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
  • 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
  • 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.
  • /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.
  • 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 https://my.vodafone.pt
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/iX/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
vodafone.pdf
393628477ef5b8b8c504098f186d622754125dd7bcb04e55176f6f77236809f7		 pdf-embedded-file PDF EmbeddedFile object 57 at offset 0x10244 37888 bytes
Detection
ClamAV: Win.Trojan.Rozena-131
Obfuscation or payload: unlikely
javascript_obj0058_000.js
b194c5e6dd6966dbe501b6bf4ea66458e9753c8d27c089fb33ae695236b6ae08		 pdf-javascript-stream PDF /JS object 58 at offset 0x14F20 57 bytes
font_00_cff_off00009e91.bin
da64c071026a319d3bdaf84d54c7e27fa98fc66b05678a879be91a5f308e9303		 pdf-font-stream PDF embedded font (cff) at offset 0x9E91 1154 bytes
font_01_cff_off0000a335.bin
74d7b9483770d6032ff1bfa2a607292c81b4e2fcf4ba992ffb1efa17ab668189		 pdf-font-stream PDF embedded font (cff) at offset 0xA335 7212 bytes
font_02_cff_off0000baf0.bin
11db81ae7f85813cddb0a83dc44adf8fd22d43037f2f3b250865ba332a16a55c		 pdf-font-stream PDF embedded font (cff) at offset 0xBAF0 1910 bytes
font_03_cff_off0000c192.bin
96a3b178556b9472e81df2a3e02bd1d9eaa80a66389e959f8599956f5ed0322d		 pdf-font-stream PDF embedded font (cff) at offset 0xC192 2991 bytes
font_04_cff_off0000cd29.bin
396df0e02359a2c467b1c130ef032096f75ac4c426c3cc45cd4ba6bae409892d		 pdf-font-stream PDF embedded font (cff) at offset 0xCD29 1236 bytes
font_05_cff_off0000d1a9.bin
1227b753a8057b6eecde18c2828e97a80b7f57a64679120c71bc4fda71457123		 pdf-font-stream PDF embedded font (cff) at offset 0xD1A9 4995 bytes

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