Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb8238aab2b9025…

MALICIOUS

PDF

186.5 KB Created: 2020-12-03 20:13:26 +03:00 Authoring application: mPDF 7.1.0 First seen: 2023-12-11
MD5: 9c6b93ccc8efeb1e59cb8ad28ef50cb9 SHA-1: 76fa44a9e1f9a837bcb0466a1f9b997d6b2cf640 SHA-256: 9cb8238aab2b9025b16e47652d681bfaf565055d9a8014d12dea6b365c4912c1
72 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0006

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/calsense PDF link annotation
    • http://plaschke-partner.com/uploaded/c8600-service-manual.xmlIn PDF document text
    • http://casms.org/atts/news-files/how-to-change-apps-password-in-r12-manually.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_off00006ef3.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_009_off00006ef3.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_off00006ef3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6EF3 19996 bytes
SHA-256: 8e639af5f37a01c952d7fa5ae521c275babc199f4d44038938bf51c1324a673d
font_01_sfnt_off0000a4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4CF 19964 bytes
SHA-256: 5154a7c8cf7a9b55c2f939ad6a4a8f8327cd6552b9f68a87c49d10dfc747eaa8
polyglot_child_pdf_off0000000f.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0xF 191000 bytes
SHA-256: c35d9b9ef598612037a9f1136f6078d64809261a5a26214e982e0cf991733d12
polyglot_child_pdf_off0000001e.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x1E 190985 bytes
SHA-256: d50511f86db446c4bc3f64173bb15286fa6a423dd79fb0d8068f8df359bd625b
polyglot_child_pdf_off0000002d.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x2D 190970 bytes
SHA-256: 4ba2f5e73d51a8c19bfaa3a468422d4bbf4b4ccbe99a9a320d1f59ef310899c4
polyglot_child_pdf_off0000003c.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x3C 190955 bytes
SHA-256: 7161d9bf49a81a57cd3a36ea8d2381cbe8f45c2c46015deb2fc7fd39e3402456

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