Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf97fe8143eae130…

MALICIOUS

PDF

41.8 KB Created: 2020-11-07 13:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 57e38cf081938e4933c9473773f26813 SHA-1: 1fdfa9c3c68bb54067880593c29322f7b791d5fa SHA-256: bf97fe8143eae1300d6c47dab052087ab5d2973427445e4a2c43ff9cdae4dd46
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://traffset.ru/aws?keyword=download+google+chrome+offline+installation PDF link annotation
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/9080271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f9dd46fe9745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5f8a073854a6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451221/normal_5fa05fc8d0c23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jelobovape.files.wordpress.com/2020/11/hamilton_the_revolution_free.pdfIn PDF document text
    • https://junevip.files.wordpress.com/2020/11/chapter_10_cell_growth_and_division_vocabulary_review_answer_key.pdfIn PDF document text
    • https://pifakimep.files.wordpress.com/2020/11/fododuxuxinoni.pdfIn PDF document text
    • https://lovubigizimu.files.wordpress.com/2020/11/yojana_telugu_magazine_2019.pdfIn PDF document text
    • https://rigimep.files.wordpress.com/2020/11/99574351036.pdfIn PDF document text
    • https://jinojexofag.files.wordpress.com/2020/11/xerobikiranamusa.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/maytag_bravos_repair_manual_mtw6700tq1.pdfIn PDF document text
    • https://rokiris.files.wordpress.com/2020/11/assetto_corsa_config.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_off0000634d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634D 5524 bytes
SHA-256: a7d89256e016cb25fb3dcd9b38844b455fd5f77600dc738c0a8563903ca9cb56
font_01_sfnt_off0000760b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760B 10776 bytes
SHA-256: a32cd58e5fadffe015ab269e049e385d7b00486662b2f2cddee15a8ff544e37f