Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d52d5ad15649b4a…

MALICIOUS

PDF

73.0 KB Created: 2021-02-27 03:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8a20dac393131abaa4ec65b6d2904e1f SHA-1: 20fb199da30b7c0a3e51820c2f8ec72f9269de1b SHA-256: 9d52d5ad15649b4aed88fc036e2b796127ed0f1b4072b54fa2fdd3fd01f27056
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/award?keyword=times+tables+worksheets+2nd+grade PDF link annotation
    • http://design-kvartira.info/icarus_paradoxrpj6o.pdfIn PDF document text
    • https://cdn.sqhk.co/guvelebul/Mthheha/melodyne_autotune_effect.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/how_to_lie_with_statistics_summary.pdfIn PDF document text
    • http://prizinsta24.space/nordictrack_panel_doesnt_work0zi1r.pdfIn PDF document text
    • https://zomereke.weebly.com/uploads/1/3/5/3/135397468/nixobew.pdfIn PDF document text
    • https://risixugetiso.weebly.com/uploads/1/3/5/3/135317557/zugubepibag_lerusugevela_zidefoduf.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/igcse_chemistry_textbook_fourth_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/hkaCwid/fajokuwemudesixufuxenuxuk.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/Y6RpjeF/spongepop_color_fill_puzzles.pdfIn PDF document text
    • https://cdn.sqhk.co/lunexubafexo/ggjPbjj/homeschool_classes_palm_beach_county.pdfIn PDF document text
    • http://8gusevshop.website/how_to_connect_samsung_hw-h550_soundbar3hfxu.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/fasafabatip.pdfIn PDF document text
    • https://cdn.sqhk.co/kedetofido/njeLBja/knife._io_3d_models.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/tokafanawa/angkor_wat_official_guides.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_off0000e04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04C 5616 bytes
SHA-256: e8944ea9aa1146a0b008f887c6e6f8695594417dbd40267a51a83a1f45dae086
font_01_sfnt_off0000f348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF348 10412 bytes
SHA-256: 67936da6ebb01b725e3e5a499eb372b20fe5cb85e891da4576c3ad1c10ea9d15