Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf5144535bf6df8…

MALICIOUS

PDF

78.0 KB Created: 2021-02-16 08:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4ff07749c577316225f368eeac8e5cc4 SHA-1: 0ac45472d6dd67122354dc16433052c357a4ac8b SHA-256: 7cf5144535bf6df87e3b3c0a00ac7ab39024b4ba4a913f7cc9f6068b9e9ef2aa
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://baarspo.ru/wix?keyword=characteristic+processes+of+science+and+technology PDF link annotation
    • http://zupedaganivo.66ghz.com/teacher_centred_vs_learner_centred_methods.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487413/normal_60047fb08d3a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_601cce81ec988.pdfIn PDF document text
    • http://buliwomof.22web.org/catalysis_letters_guide_for_authors.pdfIn PDF document text
    • http://gejopuzebizovuk.iblogger.org/anexos_do_simples_nacional_2018_em.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444092/normal_5fdb31669bed4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duzewinabo.epizy.com/fadufizimo.pdfIn PDF document text
    • http://timarerovasezot.epizy.com/naboluf.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/sindhu_bhairavi_serial_ringtones_free.pdfIn PDF document text
    • http://nexofemexer.epizy.com/nccn_guidelines_for_patients_kidney_cancer.pdfIn PDF document text
    • http://dakinopelijanup.rf.gd/metal_gear_solid_1_keyboard_controls.pdfIn PDF document text
    • http://fadakivok.rf.gd/deruwutiziginudabunuvika.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/adobe_reader_english.pdfIn PDF document text
    • http://ketaxijos.rf.gd/12872503717.pdfIn PDF document text
    • http://kosoluzenoderu.epizy.com/chillin_like_a_villain_piano_sheet_music.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_off0000f442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF442 5424 bytes
SHA-256: 1be1229e77302f792f3079364788df940ba45ee5c813a4a23a4c22cb8de00029
font_01_sfnt_off000106b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B5 10596 bytes
SHA-256: 66d06589a2ceebd791c275c0f9fc75aa09d2e673cd78e6af87d4a4ecb70621c3