Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35615d6bdb70fe0…

MALICIOUS

PDF

71.1 KB Created: 2021-02-14 11:14:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6c966855efc0eb58db37a52e0d961a7e SHA-1: fd05093a2b11f4b81276aff451c2328f0c85c504 SHA-256: c35615d6bdb70fe0f25d1786dee32ecc7aa343a05c2df5e995a0439aeb3a1ffd
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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://jacksth.ru/wb?keyword=clothespin%20frog%20craft%20template PDF link annotation
    • https://cdn.sqhk.co/birofinud/hehgjCG/android_messages_won_t_download_pictures.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/lavanovowiti-gotarewonoxakem-kovazo-bevezola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403936/normal_60119da99eac4.pdfIn PDF document text
    • https://zutuvibob.weebly.com/uploads/1/3/1/4/131407898/4585076.pdfIn PDF document text
    • http://raisinslabs.club/pdf_to_word_converter_zamzarnffcd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390995/normal_5fcf40f6e6798.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/cP3oFvD/74716500659.pdfIn PDF document text
    • https://xowavexinoj.weebly.com/uploads/1/3/1/4/131408618/7392d.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/alZnHTo/dog_collars_dachshund_puppy.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/9721844.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/s8xie4p/battery_operated_garland_outdoor.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/80892297198njzic.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zagizub.rf.gd/mikuni_flat_slide_carburetor_tuning_manual.pdfIn PDF document text
    • http://sulowufesesikep.epizy.com/89238666636.pdfIn PDF document text
    • http://fiduritunibo.epizy.com/zaxugavuvajasemijadoruni.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_off0000da02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA02 5332 bytes
SHA-256: fb5f2d589ab294a304d3f3235e7acccc7fc3a9f9f84613b8694bf7433d3d2145
font_01_sfnt_off0000ebfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFC 10424 bytes
SHA-256: d1ea58a54e55b49632b7cab8960199996cddd805231c93ba4e255e3c3ba0e236

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