Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bdc1813796b3705…

MALICIOUS

PDF

68.4 KB Created: 2021-02-20 16:42:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 774e8f07cf1c223992f3aff1028bab18 SHA-1: d1c81b9b9a365d7a31666593365668ce2df06f94 SHA-256: 7bdc1813796b37054b167d23457beadb6200b26c272fca92458e29d0184ff359
184 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=kjv+archaeological+study+bible+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393370/normal_602418b84e403.pdfIn PDF document text
    • http://899themes-demo.ru/agile_mind_homework_answer_key45zsi.pdfIn PDF document text
    • http://boomerangoo.site/filukitubawziinl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503791/normal_6025912be7a2d.pdfIn PDF document text
    • https://fomodaduvi.weebly.com/uploads/1/3/4/7/134700625/nimutu-zorifibivit-jukevawewos-kutojije.pdfIn PDF document text
    • https://medotufise.weebly.com/uploads/1/3/4/5/134512565/9405930.pdfIn PDF document text
    • https://nupowanekajotut.weebly.com/uploads/1/3/0/8/130815303/sexidafuxateloram.pdfIn PDF document text
    • http://tramlaweq.online/podotobow5fdn.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/tifBWjf/kosujatinazonuxilegilefef.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirorip/Cugdjaq/71227911429.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/anatomia_de_cabeza_y_cuello_gratiscs96p.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/mulerux/zuvip.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/66316889017.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/repovezobuj.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/business_accounting_ledger_template.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_off0000cea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA0 5764 bytes
SHA-256: 0f5b859985f100c0190b7e899fb32df3cc1ef5a22726a7e867c8b2f6a88add63
font_01_sfnt_off0000e24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24D 9968 bytes
SHA-256: 4e4a5947ea89c33105ce6fea02073246fe04127c251c5d2cec34dd49ccbeedb4