Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4897570c5fc800…

MALICIOUS

PDF

72.7 KB Created: 2021-02-27 03:31:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cd804838606a33a9113fac9e089ba4ea SHA-1: d953083b4a2ef40c68f581784127795c06293843 SHA-256: ea4897570c5fc800ab88a1008236b818530cff90dc336e3a8008a98f90136ca1
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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
  • 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/award?keyword=how+to+find+critical+value+in+z+table PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489422/normal_60315c66cc7fa.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/hjgivfi/85299641315.pdfIn PDF document text
    • http://paselon.getenjoyment.net/xazexewibesupixidolasog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417527/normal_6036b4527cdad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420434/normal_5fdd35667e8a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486054/normal_600eb346409cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443823/normal_6025579dda518.pdfIn PDF document text
    • https://cdn.sqhk.co/visesefider/stgdheE/nevugaloronaniresefiwaxed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/25255440494.pdfIn PDF document text
    • http://buxamojajowolos.rf.gd/senior_leadership_team_meeting_agenda_template.pdfIn PDF document text
    • http://litorow.myartsonline.com/english_verb_list_with_spanish_translation.pdfIn PDF document text
    • http://darozux.epizy.com/lofawetifajojizolexokapa.pdfIn PDF document text
    • http://xajuvezovaguze.rf.gd/didag.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_off0000ddcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCC 5140 bytes
SHA-256: d36c55d1a05febdfbbb01b1b5ade4d8dc70c8ee67377a4168e3bf9a8a0dbc8c9
font_01_sfnt_off0000ef75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 11356 bytes
SHA-256: 39fd9df23187384b01c68c0798a8fc53709e71c2f754cd67bdb7ac0284401664