Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb46c8e9fb9f2213…

MALICIOUS

PDF

160.7 KB Created: 2021-08-16 23:55:27 +03:00 Authoring application: mPDF 7.1.0 First seen: 2023-12-11
MD5: bd61ef2929324db3d1d1a5d71af7912c SHA-1: 087f9ab6bf83644c4df07365f39fc9f2ba383e32 SHA-256: cb46c8e9fb9f22133d0b51fc1503bee05ce1c2ab27d829255a1b7f4511fa4940
112 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0004

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/carrier PDF link annotation
    • http://www.optus.ca/userfiles/bosch-wfk-2401-manual-download.xmlIn PDF document text
    • http://vertex-decor.com/userfiles/bosch-wfk-2031-manual.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_off00006a6d.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_009_off00006a6d.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_off00006a6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6A6D 19880 bytes
SHA-256: 1333de742ddcbfaca7a569e26cee61a317f00a78edbf54c87ca4b8d69fd04dd6
font_01_sfnt_off0000a00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA00A 19964 bytes
SHA-256: 5154a7c8cf7a9b55c2f939ad6a4a8f8327cd6552b9f68a87c49d10dfc747eaa8
polyglot_child_pdf_off0000000f.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0xF 164585 bytes
SHA-256: 00a6294d5fb1c8a3d07faa1a2307fd1fcf1dce4bda578103c3f3203c2270e7f5
polyglot_child_pdf_off0000001e.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x1E 164570 bytes
SHA-256: 5e9ed5779d8ec903a64fc2caaea1cf18a60e509a6a04da9938d4d57446260d57
polyglot_child_pdf_off0000002d.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x2D 164555 bytes
SHA-256: 8882c63b37f771d6212728dc7af2f4d8047b7f8fe27558dd2947f06d5c666b61
polyglot_child_pdf_off0000003c.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x3C 164540 bytes
SHA-256: 36ebc10545e990e3e5a17fb46f38cd27e30321a8120377c26e89a3ac49463214

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