Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c1c5318595562b…

MALICIOUS

PDF

74.1 KB Created: 2021-01-24 08:03:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5536738bd81f56a3eed6dc168c364821 SHA-1: 2ef2b1ba36bbcfe172738f0ee53fe8e0a88e1f60 SHA-256: f8c1c5318595562b65454fa206983a5a3aa4eedd36b5522f3322c432c4f2391e
134 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 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://maypoin.ru/wb?keyword=color%20splash%20magic%20recolor%20photo%20art%20effects%20app PDF link annotation
    • https://cdn.sqhk.co/tupipitijil/ephiMjf/vowenifufuz.pdfIn PDF document text
    • https://site-1260633.mozfiles.com/files/1260633/hospital_disaster_recovery_plan_template.pdfIn PDF document text
    • https://site-1188771.mozfiles.com/files/1188771/59644615194.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476007/normal_5fe45e0768a95.pdfIn PDF document text
    • https://site-1166670.mozfiles.com/files/1166670/79460943116.pdfIn PDF document text
    • https://site-1178468.mozfiles.com/files/1178468/92962622332.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/fihhbjc/islands_for_sale_usa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418786/normal_5fff80fe62460.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393208/normal_5ffb7082d32f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_5fd160397754f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367281/normal_5fc9074c966fd.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/vuforewebub/calculus_differential_equations_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/18298694499.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/nelom.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/partnership_agreement_form_word.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_off0000e4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C4 5332 bytes
SHA-256: 6de47b8dedaf8e8e64baef28c5b6d4f6150779bb3dbb21f31f293d526dc399e3
font_01_sfnt_off0000f6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BA 10732 bytes
SHA-256: e3ee316f6d0cd2bb4685f7e35464f5f098574517ccfb60711dec37d8f340e3ef