Malicious PDF — malware analysis report

Static analysis result for SHA-256 14080aeadfc8f170…

MALICIOUS

PDF

565.4 KB Created: 2007-02-19 15:01:03 +01:00 Authoring application: QuarkXPress: pictwpstops filter 1.0 (via Acrobat Distiller 7.0 for Macintosh)
MD5: f976d18e6e0d0416f8a211e4f92dd0ca SHA-1: 94c711070950853e7cc6507426446a35630c16bd SHA-256: 14080aeadfc8f17054924ea2c1e31349fc4cf32cf0e8b4a3976792540b4c9b10
516 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that utilizes the `exportDataObject` function to launch an embedded executable disguised as 'agresivita.pdf'. This executable is detected by ClamAV as 'Win.Trojan.Rozena-131'. The PDF also contains a launch action targeting 'cmd.exe', indicating an attempt to execute arbitrary commands, and is flagged by multiple critical heuristics for launching payloads and embedding executables.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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\\agresivita.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 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/tiff/1.0/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/g/img/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
agresivita.pdf
2a045cfc2fd63b173a3c163fe9f237b2f74b3ebff310a5660b9f547360aa10c6		 pdf-embedded-file PDF EmbeddedFile object 143 at offset 0x883FC 37888 bytes
Detection
ClamAV: Win.Trojan.Rozena-131
Obfuscation or payload: unlikely
javascript_obj0144_000.js
6ef767ecc3bb1d4685726842e68870b2a014deb64082ff61aee9800b0744268d		 pdf-javascript-stream PDF /JS object 144 at offset 0x8D15C 59 bytes
font_00_cff_off00015d6f.bin
95aa2371126a5c19ef7bf7ededcd3d5c648b83fab47282ab09c056b46cec1abf		 pdf-font-stream PDF embedded font (cff) at offset 0x15D6F 45898 bytes
font_01_cff_off0004d0fe.bin
c869fd2a0d1c02979e0eeb3dcb7e9c05e22110ebf29c8ebf433328e98918a692		 pdf-font-stream PDF embedded font (cff) at offset 0x4D0FE 46806 bytes
font_02_cff_off00065ea1.bin
06d52e471b5fbdbe721a4e81c62bf594a0f05fdc26837ae13e02e5b3b5efb33d		 pdf-font-stream PDF embedded font (cff) at offset 0x65EA1 46056 bytes
font_03_cff_off0006de7f.bin
c7cf90c8f9090428b00e4c1ea61445a6f1beacd95d53ba682610027d56a45d5d		 pdf-font-stream PDF embedded font (cff) at offset 0x6DE7F 29808 bytes
font_04_cff_off00074f33.bin
725a8179b2eb936c83181c7c4d5b7781a852b5d03086994cea6020a265771dcf		 pdf-font-stream PDF embedded font (cff) at offset 0x74F33 45993 bytes
font_05_cff_off0007d601.bin
fb42527f12ed98072f7ba0143752f3279e3ac08a96c8a5fe767ca36803193d07		 pdf-font-stream PDF embedded font (cff) at offset 0x7D601 46508 bytes

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