Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb658dc129e2077…

MALICIOUS

PDF

67.9 KB Created: 2021-03-03 21:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b33478b26c898e84ca733da3ccf1ea41 SHA-1: 1263d33de6d0d3bf1a79afe8c45b04c5d1a62b1b SHA-256: 1fb658dc129e2077ce669911aa0bb24b8be152c1cf128922c802bebf3df3520f
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=radioactive+decay+problems+worksheet PDF link annotation
    • http://nibewubixela.getenjoyment.net/what_is_quantum_numbers_chemistry.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/vQPVjcn/rilobep.pdfIn PDF document text
    • https://cdn.sqhk.co/muwanije/4gdj3je/how_to_get_free_skins_among_us_pc.pdfIn PDF document text
    • http://cryogen.me/great_crossfit_jump_ropeslospd.pdfIn PDF document text
    • http://gayerkan.com/encyclopedia_brown_book_levelk634o.pdfIn PDF document text
    • http://coins24h.com/thorium_magic_class_guiden47z2.pdfIn PDF document text
    • http://hookup666.site/how_to_record_on_yamaha_ypg_535hwvpf.pdfIn PDF document text
    • http://naturwows.space/31876003677dnt4t.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/b3Wijsh/45070225336.pdfIn PDF document text
    • http://umdtheatre.ru/ruwabosamuc4s8z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/vubebasirilusadolato.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/bonezat.pdfIn PDF document text
    • http://tifavamifikas.myartsonline.com/milpersman_1306_instructor_duty.pdfIn PDF document text
    • http://pisepivowunasi.rf.gd/film_camera_app_free.pdfIn PDF document text
    • http://vubukenod.rf.gd/19322257459.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_off0000cc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC07 5780 bytes
SHA-256: e2cfb7dbca888debf4591a9d9c9db46a34abced176cd43535d410bd4ffb43cd1
font_01_sfnt_off0000dfa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA2 10332 bytes
SHA-256: 0e35bb60df14e5e887410848684835e5f30c6329a646936da7261aa248f248ef