Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34b96ef24cd1841…

MALICIOUS

PDF

76.7 KB Created: 2021-02-08 23:02:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4a49fdccb40c476d028b9d9736c45c9f SHA-1: d22baa83f226c5e7a48b0c37f992b9f82b8133d4 SHA-256: a34b96ef24cd184142a959a5f9e02d3470b5e8550ebaf9ea3eae0f07fcaacf90
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/aws?utm_term=ashrae+15+pdf+free PDF link annotation
    • http://titoto.xyz/examen_de_excel_avanzado90k4z.pdfIn PDF document text
    • http://henrysavbr.site/mupemomexuzagezuzobomnrcwd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_5fe6d0568594d.pdfIn PDF document text
    • http://flowerport.store/nujazuvulonabinerodij7pjvc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485448/normal_60046bac398e4.pdfIn PDF document text
    • http://austritkfa.com/zs-_042_datasheet8jau0.pdfIn PDF document text
    • http://socialwave.me/tkb_guru_agama_islamdldsq.pdfIn PDF document text
    • http://luchdobro.site/283351275279zlas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_600e9cc2ac0a4.pdfIn PDF document text
    • http://usecabinets.xyz/23322518835ufahv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411694/normal_5ff3aef1368c8.pdfIn PDF document text
    • http://igonlinesupport.com/lucid_dreams_keyboard_sheet_musicsbhl7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529024/normal_5fee61b32282b.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/vuxalirudidel/gizosujiviwunivu.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/go_math_book_answers_grade_8.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/december_calendar_template_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC0 5260 bytes
SHA-256: 3c1af9eb201c6262b35bdbccaa80dd34689fed6d99492fb5b41ead3fd5149d9b
font_01_sfnt_off000101a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A9 10700 bytes
SHA-256: 152ce0138077be8b626ecb6cce45ba2ec0b63a7684a6355197b79e121bb53621