Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ee76dad58c6871…

MALICIOUS

PDF

173.9 KB Created: 2021-08-16 00:05:41 +03:00 Authoring application: mPDF 7.1.0 First seen: 2023-12-11
MD5: 19ab42cba262e291357f21896a8a5612 SHA-1: 0dac12223bdc335fa3c306218950fd8e48b00232 SHA-256: b3ee76dad58c6871de569fd24560eff90ef0df0c043b88846fc854a2a14fa3e5
132 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0004

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/cara PDF link annotation
    • http://grandp.ru/userfiles/bosch-maxx-front-loader-washing-machine-manual.xmlIn PDF document text
    • http://koppeika.ru/userfiles/bosch-maxx-lifestyle-front-loader-washing-machine-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_off0000718b.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_009_off0000718b.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_off0000718b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x718B 19996 bytes
SHA-256: 8e639af5f37a01c952d7fa5ae521c275babc199f4d44038938bf51c1324a673d
font_01_sfnt_off0000a767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA767 19964 bytes
SHA-256: 5154a7c8cf7a9b55c2f939ad6a4a8f8327cd6552b9f68a87c49d10dfc747eaa8
polyglot_child_pdf_off0000000f.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0xF 178095 bytes
SHA-256: 9ca6eefc998672d1a65f2ee1bf61822da710c887f681aa4d0ec82b8cf2d214dd
polyglot_child_pdf_off0000001e.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x1E 178080 bytes
SHA-256: 001ce05ccecf06e0d0ac49e615ec8ada478879bb080fd4a6d3cefd66b7154b06
polyglot_child_pdf_off0000002d.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x2D 178065 bytes
SHA-256: e1ac65e49d596c43fbed87f23d529cf2c50b8e6dbc0569c1c02d754aa527f2eb
polyglot_child_pdf_off0000003c.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x3C 178050 bytes
SHA-256: 1c3c352e5043988530fa130e1fc30dee9367f8137ad779595c95dbcb84c87217

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