Malicious PDF — malware analysis report

Static analysis result for SHA-256 d262bcfc3793663f…

MALICIOUS

PDF

79.9 KB Created: 2021-03-22 22:31:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f64b01e4dc4b804df1f8b9e0c2b0bb59 SHA-1: ca6a33af2181aee6f577589b28f80cbfc2eb8142 SHA-256: d262bcfc3793663f01e9919b7dca2b0bf03444638d4353a3bbfbfc1dc945706d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many hosted on disposable domains, indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/123?utm_term=apraxia+da+fala+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471512/normal_5fed79e18d0a7.pdfIn PDF document text
    • https://dujapiloxi.weebly.com/uploads/1/3/1/8/131857305/sujiluxa.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/wuwazepugaregebe.pdfIn PDF document text
    • http://nesarose.sportsontheweb.net/reverse_chronological_resume_sample.pdfIn PDF document text
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/xidulajupuseka.pdfIn PDF document text
    • https://sadejakudabad.weebly.com/uploads/1/3/5/9/135965210/4822129.pdfIn PDF document text
    • https://tewosafaxuw.weebly.com/uploads/1/3/1/3/131379700/renivorowogoditebeka.pdfIn PDF document text
    • https://vejazejama.weebly.com/uploads/1/3/1/3/131381369/03708.pdfIn PDF document text
    • https://sonotipudo.weebly.com/uploads/1/3/4/3/134326760/e58485140.pdfIn PDF document text
    • https://kikimegaxexamez.weebly.com/uploads/1/3/5/3/135392900/2c181a9078d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374835/normal_600299cc08556.pdfIn PDF document text
    • http://lukufogud.getenjoyment.net/livro_genetica_thompson.pdfIn PDF document text
    • http://didazema.mypressonline.com/export_keynote_to_imovie_on_ipad.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/jowotikip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506159/normal_5ffb83dca1655.pdfIn PDF document text
    • https://katawemot.weebly.com/uploads/1/3/4/3/134308113/2984719.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/motorcycle_diaries_full_movie_online_english.pdfIn PDF document text
    • http://nekidifuton.medianewsonline.com/41081816735.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kavuduvolilazod.myartsonline.com/5_canciones_faciles_para_guitarra.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/what_companies_have_closed_due_to_covid_ukraine.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/ginomodusowetu.pdfIn PDF document text
    • http://lejiletuvasipib.onlinewebshop.net/rca_rcrn04gr_universal_remote_codes.pdfIn PDF document text
    • http://punotonaduwize.atwebpages.com/caso_de_ayotzinapa_resumen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 4288 bytes
SHA-256: b005f040e4355b7a4415e70cb9c10b06ace1f1775ab333244480066b13b8aa54
font_01_sfnt_off0000fb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB62 12828 bytes
SHA-256: badb5747885d8d5aee560cc4de94574552f112e7f20769184cad2c1eb025935e
font_02_sfnt_off0001229a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c