Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d89783ebc6f270…

MALICIOUS

PDF

70.8 KB Created: 2021-02-12 03:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b1f9320509ce17de74c7eec04c9eac41 SHA-1: a0975cb3da318d1ed0b07b5d5a9fe567a2857c72 SHA-256: 58d89783ebc6f270e4f5ce86d30b15af9a19bd9da877e015151c9c25a76ce96e
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://baarspo.ru/wix?keyword=algebra+2+solving+radical+equations+worksheet PDF link annotation
    • https://fiwirozubaxezu.weebly.com/uploads/1/3/4/6/134659856/sinav_xuwodejovizefa_jukijup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386361/normal_6003042608874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5fd6da0f0c4d7.pdfIn PDF document text
    • https://metasabuvaro.weebly.com/uploads/1/3/2/6/132681671/fozulabumawe_nefixa_kunap_wagavubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419827/normal_601a9b51cdf37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487918/normal_5fd96d9688a2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449187/normal_601194f2d27ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411916/normal_5fea2c1920f19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_6023720f69b95.pdfIn PDF document text
    • https://zixudepapu.weebly.com/uploads/1/3/2/3/132303172/5728fe40fe60b.pdfIn PDF document text
    • https://loxutagunepolu.weebly.com/uploads/1/3/4/7/134763456/wumisiwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411220/normal_5ff104565f2bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://togipumenotu.epizy.com/leveson_report_key_points.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/cipherlab_8000_manual_em_portugues.pdfIn PDF document text
    • http://tapavakagazu.epizy.com/whatsapp_gb_plus_apk_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95C 5684 bytes
SHA-256: 967028d4acb1c2174453783f87591b925884803f19b02ca38dca7f6ebd63673f
font_01_sfnt_off0000dca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA9 10344 bytes
SHA-256: 1312025be032000c7b3bbca7fdafb1c181537448c0c838b86dedf016cfe48a90
font_02_sfnt_off0001001b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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