Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a5e5c94259ae7d…

MALICIOUS

PDF

71.9 KB Created: 2021-03-04 23:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d62a02216b34fa0f4502eace35ec41a0 SHA-1: a027eb683320ff46c6d5836d189f47f8a372897f SHA-256: 51a5e5c94259ae7db8a14a921d768b37f05163f0782e04129117d884724278ec
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/award?keyword=pance+prep+pearls+2nd+edition+ebook PDF link annotation
    • https://cdn.sqhk.co/norowitidot/hdShaha/light_blue_room_what_color_curtains.pdfIn PDF document text
    • https://jepejopik.weebly.com/uploads/1/3/4/6/134610321/4607789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426415/normal_5ffad05878cf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476127/normal_5fd04d948db58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392472/normal_601d685229aa2.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/dvlHiaL/58608038817.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/faraxunanatora.pdfIn PDF document text
    • https://vitasexabu.weebly.com/uploads/1/3/0/8/130813400/durulose.pdfIn PDF document text
    • https://sabiverusixupo.weebly.com/uploads/1/3/0/7/130738528/c18aab.pdfIn PDF document text
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/direxizuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/hfggvFS/pebef.pdfIn PDF document text
    • https://cdn.sqhk.co/ketusugedi/heWgi4K/aesthetic_painting_ideas_acrylic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483591/normal_5fde8677e9d38.pdfIn PDF document text
    • https://vazemewezasal.weebly.com/uploads/1/3/0/7/130775722/9368648.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405660/normal_5febf965d3888.pdfIn PDF document text
    • https://dizorewumuzesab.weebly.com/uploads/1/3/4/0/134012942/rutozajix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_4ddd59fc71b742559fc64c301ccd6e82.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/free_grade_sheet_templates_for_teachers.pdfIn PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_fd69c637986c49689b34a47785c1f448.pdf?index=trueIn PDF document text
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_9ade04edf9894e79bd6f88cc9cf190e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/ensure_insurance_plc_annual_report.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_off0000db67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB67 5404 bytes
SHA-256: 2f398adc789e3f872ac68c66ba4d99c360e1ae174c974d2980a1ca017a256fb3
font_01_sfnt_off0000edd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD4 10628 bytes
SHA-256: 26ab7dfdf110950d4a87d555adfcd5cf2fc68bf887d3f82a3a84bdfce7e24100

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