Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fbc2dd9478408b…

MALICIOUS

PDF

165.1 KB Created: 2020-12-13 02:07:23 +03:00 Authoring application: mPDF 7.1.0 First seen: 2023-12-11
MD5: 87480c10b99b94fdf22edc6025fa2290 SHA-1: 5e0ac3bd989906cbbd93bad9e6683d33c214cead SHA-256: 98fbc2dd9478408b28247d7b3fc4daa53bb5246f549f02f08b8cf7fb25af215b
72 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0004

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://srwt.ru/pdf/canon PDF link annotation
    • http://gymostrov.com/gymostrov/userfiles/jrc-ssas-manual.xmlIn PDF document text
    • http://asea-admin.com/_userfiles/20201209143059.xmlIn PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (stream_009_off00007427.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_009_off00007427.bin)
🗂 Part of campaign: secureserver.net 1471 samples

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00007427.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7427 19836 bytes
SHA-256: ad6d801f7554b4de8183daf312cecf2a3a65662328777b95eb4eaac8815799eb
font_01_sfnt_off0000a9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A4 19964 bytes
SHA-256: 5154a7c8cf7a9b55c2f939ad6a4a8f8327cd6552b9f68a87c49d10dfc747eaa8
polyglot_child_pdf_off0000000f.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0xF 169004 bytes
SHA-256: 7c9039ed2d83b31e74fb914c762da82d70bdea1009337a9b636c0d57160520a9
polyglot_child_pdf_off0000001e.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x1E 168989 bytes
SHA-256: f2b9a1e126d3d1152a988ad4a2e9de7e729ebe05355dd9bd0d5c4abf9329a07a
polyglot_child_pdf_off0000002d.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x2D 168974 bytes
SHA-256: 3a6e843555d7a5f4bcf3bf33269832097607394b6466761b7fcb18914d75c544
polyglot_child_pdf_off0000003c.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x3C 168959 bytes
SHA-256: afae0ca62e54ddadfcf44c432934d4d3a363262f003e0ad1f73c660971bfe7c4

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