Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c1ae88984c4de4…

MALICIOUS

PDF

359.4 KB Authoring application: Python PDF Library 055 http072057057pybrary056net057pyPdf057
MD5: 11e1ec796f060e2b5918b22a778484ec SHA-1: f1af72a234cfc92b265b58cd2b78a453f735862e SHA-256: 26c1ae88984c4de4ad71d493f22f2ed4ed4e3d765a70ef2c3d2631c84b9d2330
184 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded JavaScript and RichMedia (Flash) content, indicating an attempt to exploit vulnerabilities. The 'POLYGLOT_CHILD_PDF_STATIC_TRIAGE' heuristic firing confirms a secondary embedded PDF with similar suspicious findings. ClamAV detection as 'Pdf.Exploit.Agent-23728' further supports its malicious nature. The embedded URL, while currently marked as benign, is part of the exploit chain.

Heuristics 7

  • 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.Exploit.Agent-23728 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-23728
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0007.bin
3f8e0576de2e9af38360a78e3ca79d41fb9060cefdb628cb69589ea03d1d3358		 pdf-embedded-file PDF EmbeddedFile object 7 at offset 0xB4F 772 bytes
polyglot_child_pdf_off000584f3.pdf
73c5f3690d31bb321981a1e4ae0943781cde7f9c9e09faf1127c40a988a33e5a		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x584F3 6297 bytes

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