Malicious PDF — malware analysis report

Static analysis result for SHA-256 7161660a1f0c098e…

MALICIOUS

PDF

41.8 KB Created: 2020-11-06 18:20:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 88df2f5d306d823e5de19ceae400a4ba SHA-1: 543b1f9a8ac00ddfaafa386bb279d9d2f54910bb SHA-256: 7161660a1f0c098ead90b880da6ca1b6e588b47d9a7fdd553f13e7e1beea8945
106 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://trafffi.ru/123?keyword=showbox+free+download+apk+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8fa2be03d51.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://saridejawe.files.wordpress.com/2020/11/mupinakekasepibumejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325a628d-d3e2-467d-b395-c809cbf87014/43177524138.pdfIn PDF document text
    • https://kebupud.files.wordpress.com/2020/11/16674380217.pdfIn PDF document text
    • https://vobinujo.files.wordpress.com/2020/11/filosevopavoto.pdfIn PDF document text
    • https://sorenuj.files.wordpress.com/2020/11/29785498416.pdfIn PDF document text
    • https://wejogude.files.wordpress.com/2020/11/niwasegini.pdfIn PDF document text
    • https://nijubar.files.wordpress.com/2020/11/lopajelelezuziwej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/525a40b1-04c9-4c48-a773-fdd975b7db87/deregunijew.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/aceites_esenciales_pranarom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc9638d-0142-4f2e-8e39-c21331360e01/28481493533.pdfIn 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://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C2 5532 bytes
SHA-256: 51f392bbabe0e50cd2b2e134ce2463699e53f7269bdb3ed404f3d0a557419db8
font_01_sfnt_off000076a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A0 10580 bytes
SHA-256: 438bb1a1f55da4bada416b56ce9c7dc7d842957868079a20461a06a689563625