Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fbf8455d102e80…

MALICIOUS

PDF

78.6 KB Created: 2021-02-25 04:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1a04a423e5769524c35b62701649cd7d SHA-1: 0b9cc9a3cfce8e7df844947bb97fb84805c84efd SHA-256: 49fbf8455d102e80539ffd398584ef519899001e99dce640564ab5d6deb8d37b
186 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 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://jacksth.ru/wb?keyword=how%20do%20you%20reset%20an%20amana%20washing%20machine PDF link annotation
    • http://kulinar2020.site/las_cronicas_de_narnia_el_principe_caspian_onlinets3k2.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/2Ezhigj/is_it_worth_learning_android_development_in_2020.pdfIn PDF document text
    • https://nupafosudivoz.weebly.com/uploads/1/3/2/6/132682156/34a2816d2028.pdfIn PDF document text
    • https://tabupuja.weebly.com/uploads/1/3/4/6/134647436/465675b63404.pdfIn PDF document text
    • http://site-shop.xyz/how_to_become_an_english_teacher_in_spain4vj0o.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/c9IK4X5/14871923329.pdfIn PDF document text
    • https://pemugaladesav.weebly.com/uploads/1/3/5/3/135307247/6289788.pdfIn PDF document text
    • https://bomexufimewaw.weebly.com/uploads/1/3/4/5/134517434/822460.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/jjhcSUN/auto_clicker_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzonabudad/xhg8Y1D/ragdoll_rage_heroes_arena.pdfIn PDF document text
    • https://nubarosu.weebly.com/uploads/1/3/4/7/134726157/7734849.pdfIn PDF document text
    • http://in-step.shop/fesukukasolagiwudubijaludfkt8.pdfIn PDF document text
    • http://yazansoft.com/nl5_circuit_simulatorfseh5.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/hjUjjih/mipuzevoxanive.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jumepenitujox.atwebpages.com/java_j2ee_interview_questions_and_answers_for_10_years_experience.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_off0000f697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF697 5476 bytes
SHA-256: ea2ca58954f211ce92369ca4844e30500b448defb8c2c87c9c32c41a164b67aa
font_01_sfnt_off00010924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10924 10756 bytes
SHA-256: b6d78fc55e7e24555e86430fbdbf31e96fb26c4a19b331f14962022c473a1f85