Malicious PDF — malware analysis report

Static analysis result for SHA-256 53756cdedba59690…

MALICIOUS

PDF

74.0 KB Created: 2021-02-27 11:48:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0c5c23b0b1e35d0034d1ca529d441535 SHA-1: 9478ea80cab57a4b6aa260848f6783ec1e81debe SHA-256: 53756cdedba596909b66f7026fbb87d0d147aa565ea8e88759744244c297d05b
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/award?keyword=how+to+change+the+image+size+in+paint PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427828/normal_5fd7c1bcab8de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_5fe7ce7faa473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5fe76784c3e31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481270/normal_5fd7a098a9b68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444356/normal_60000f8ff1aa1.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/jsgf3ie/origami_flower_instructions_kusudama.pdfIn PDF document text
    • http://vagijuderotogur.22web.org/android_9_pie_call_recording_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476015/normal_6039fbcd3cb7b.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/jehjgdi/35780280752.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/nesudagefinazavijm3445.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/sorogamat/crossword_answer_for_all_without_exception.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/jupiter_monthly_income_fund_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/women_s_work_shirts_uniforms.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/android_auto_google_play_services_error.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/81766737285.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_off0000e4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B2 5320 bytes
SHA-256: 0292c7279c84e140fd5aa561000233c8f91231a8d1d1062b678e570ea7b6b93e
font_01_sfnt_off0000f6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CB 10708 bytes
SHA-256: 89d235a99191247bf62d931e09cc23981ebcec7dde6c4c181816dd3034837b66