Malicious PDF — malware analysis report

Static analysis result for SHA-256 57cdb9884077ec6b…

MALICIOUS

PDF

68.4 KB Created: 2021-02-10 09:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e8f560650c56be035446110037766746 SHA-1: 5b8ec5bc4b2306d5539695ca262003878fbe6eee SHA-256: 57cdb9884077ec6b8cde9167b112bf3895399e87f8baa2e319084fa8cea7fa7d
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://leonvi.ru/wb?keyword=indian%20wedding%20reception%20entrance%20songs PDF link annotation
    • https://gemiletux.weebly.com/uploads/1/3/2/6/132681217/tetexawitinegunusaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422645/normal_601b9f192c5db.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/verofonokavenoltau5z.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/eehC3ih/17997032105.pdfIn PDF document text
    • https://cdn.sqhk.co/bosesegivu/Diajgig/16778516086.pdfIn PDF document text
    • https://puwoposujol.weebly.com/uploads/1/3/0/9/130969317/3c98b3e0de004.pdfIn PDF document text
    • https://pabedowilopore.weebly.com/uploads/1/3/1/1/131163579/5199101.pdfIn PDF document text
    • http://zebrait.fun/pomowekelatukowusowuzugakaxmc.pdfIn PDF document text
    • https://cdn.sqhk.co/pofevadamem/GjJMojg/kobazegokegibuku.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/enYXjbv/dedanujatujakirirozesi.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelovube/HoPgizJ/ncert_class_9th_social_science_book.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/kakef/rerewarasal.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/borax_experiments_crystals_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/nobuxaja.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/calculer_age_excel_formule.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_off0000cfa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA1 5240 bytes
SHA-256: 3e7abfbf375f1da8c6fd26b751fe4b67a1ddac32f5228635f5fe18191518004e
font_01_sfnt_off0000e199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 10264 bytes
SHA-256: 19bd6969200b0dd4e70abb24d88ae2b7e54c8fd3a06cbf7a280b7f39403527e4