Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e7a76547248023…

MALICIOUS

PDF

71.5 KB Created: 2021-02-24 09:39:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: caf236f4cb57cd85a9a941a78b7d834e SHA-1: 2bf3c4a4161c03b1988f170178f71ccef7959708 SHA-256: 81e7a76547248023338f0e8b5801005b2b306c5fe52134461909e95446e77bad
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://bologen.ru/wix?keyword=lumber+tycoon+2+gui+v3rmillion+2020 PDF link annotation
    • https://fikanofuzak.weebly.com/uploads/1/3/1/4/131438747/4838999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490974/normal_600b4d05a7d0c.pdfIn PDF document text
    • https://cdn.sqhk.co/nifijagik/hPijigN/wisexiv.pdfIn PDF document text
    • https://cdn.sqhk.co/niwexifa/Zjhhje5/chocolate_cake_cookie_recipe_with_powdered_sugar.pdfIn PDF document text
    • https://podinelejuwe.weebly.com/uploads/1/3/2/7/132710627/podivenexob.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/dRcjagg/49213244081.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/ichafGw/chocolate_recipes_for_kids.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/7tIuNMg/smart_band_app_for_pc.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/notarenokav-pofipalolug-tepataf-zowogilawivitiz.pdfIn PDF document text
    • https://sowematawenuw.weebly.com/uploads/1/3/1/1/131164153/boguze.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/9d3b8f55.pdfIn PDF document text
    • https://funoridarudaru.weebly.com/uploads/1/3/5/3/135304061/9488222.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_60308d5a2c66a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447888/normal_6035b7ed2a8ab.pdfIn PDF document text
    • https://bogonifad.weebly.com/uploads/1/3/4/1/134108647/c05fbffe3.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/girilifawuxi/gezinajelaterajuwowa.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/31060873678.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_off0000d0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DB 5412 bytes
SHA-256: deb575d9eafecec8def537a971878dad715d598b0e281734d4abe78cb3164458
font_01_sfnt_off0000e350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE350 13876 bytes
SHA-256: aa87ac44d3573f268c3ff45cb2587b69a30408e58c08c956ea5c3b7ab8a047cf

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