Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d933c5db5de99a2…

MALICIOUS

PDF

633.7 KB Authoring application: Python PDF Library 055 http072057057pybrary056net057pyPdf057
MD5: 7342b9c8ad4dc4db5408b18ab7f809d5 SHA-1: 1e2d2ceb04d92c23207fc8b47cec5ff32f100582 SHA-256: 2d933c5db5de99a2faaeec13a348afb435e0132b49e063ac8f28819654953fc2
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File T1027 Obfuscated Files or Information

This PDF file has been identified as malicious by ClamAV, specifically as 'Pdf.Dropper.Agent-7244262-0'. It contains embedded JavaScript and RichMedia (Flash) content, and critically, a secondary embedded PDF. Static analysis of this child PDF reveals further JavaScript and embedded files, indicating a multi-stage infection process. The embedded Flash file, detected by ClamAV as 'Swf.Malware.Agent-7081583-0', is likely the next stage of the payload delivery. The presence of multiple embedded artifacts and JavaScript actions strongly suggests an exploit or dropper functionality.

Heuristics 8

  • Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE
    A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
  • ClamAV: Pdf.Dropper.Agent-7244262-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7244262-0
  • 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.
  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • 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://adobe.com/AS3/2006/builtin

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
pushpro.swf
015ae40c5cd76d2752f517e092c6e9097adfef08e428defe0c62b08e98ab7af7		 pdf-embedded-file PDF EmbeddedFile object 7 at offset 0xB4F 772 bytes
pushpro_1.swf
3f8e0576de2e9af38360a78e3ca79d41fb9060cefdb628cb69589ea03d1d3358		 pdf-embedded-file PDF EmbeddedFile object 7 at offset 0xB4F 772 bytes
polyglot_child_pdf_off0009ce55.pdf
b3c8a9995de47be706ab6b0c29f4e9bd84a176ca568cee9ad4c2af833cb60598		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x9CE55 6297 bytes
Detection
ClamAV: Swf.Malware.Agent-7081583-0
Obfuscation or payload: unlikely

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