Malicious PDF — malware analysis report

Static analysis result for SHA-256 6525639fca966994…

MALICIOUS

PDF

74.9 KB Created: 2021-02-26 09:00:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 884107a2b8184a9e2718eb4894958f02 SHA-1: 473895f92784d937670d64eed0caaf3e649eb8a9 SHA-256: 6525639fca9669949a72e4ea5acc097111577060d731fc02d8cef8bd6a68270c
126 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
  • 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/award?keyword=ch3cooh+%252B+agno3+%252B+nh3+%252B+h2o PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411922/normal_60131f44d402e.pdfIn PDF document text
    • https://cdn.sqhk.co/najiligopej/zqEjgcv/gaxelofekugozoruzopejaz.pdfIn PDF document text
    • https://cdn.sqhk.co/tenotitur/ihhexjb/deadly_premonition_2_bowling_split.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/what_is_the_dominant_theme_of_the_yellow_wallpaper.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/felofapopesipowilub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467912/normal_600a59f5c9791.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/61737796535.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366003/normal_5fc7e57848a11.pdfIn PDF document text
    • https://cdn.sqhk.co/bataseset/Ao6agdb/54408053499.pdfIn PDF document text
    • https://cdn.sqhk.co/pabopimi/bligMK2/lerisibupexexopajori.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/vemutezule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_60387aa01fdac.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/tim_weiner_legacy_of_ashes_review.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/foneniz/calculadora_para_convertir_de_mililitros_a_gramos.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/89704724060.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_off0000d841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD841 4956 bytes
SHA-256: e08d939549e7e442e2faa88a4bbb212a9e5346feb6bf2b23a3a986ec54240a96
font_01_sfnt_off0000e921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE921 18852 bytes
SHA-256: a69a06523e752e1017ecaf49c50371b09ee518ccaabeaec00fde38659b8cd22a