Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8058f9b4227fc4…

MALICIOUS

PDF

91.3 KB Created: 2021-03-28 22:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 21a46f770cb861b55076a7c8bda97f10 SHA-1: 4006e94ed1425ba2182513eb54e6c74264eec6fe SHA-256: ee8058f9b4227fc411204c2e7d533f52c344db7de459a9b0aa34e61bd830699a
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to zajinet.ru, suggesting a phishing or malicious redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, further supporting this. ClamAV detection as 'Pdf.Phishing.Trojan' confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/wix?keyword=shadow+health+respiratory+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366035/normal_605e1e22e06a5.pdfIn PDF document text
    • http://tonorubur.22web.org/xenov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_5fdc7e1332758.pdfIn PDF document text
    • http://cardio-natural.info/descargar_pelicula_la_cenicienta_disney1ub87.pdfIn PDF document text
    • http://nogeturafo.sportsontheweb.net/99879007988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389603/normal_605f33f96efd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381531/normal_6004eb7e3036e.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/7667425388.pdfIn PDF document text
    • http://profibrend.ru/13408896975v8vvj.pdfIn PDF document text
    • http://vigikigopaloze.medianewsonline.com/ap_grama_sachivalayam_syllabus_2020_download_ap._gov._in.pdfIn PDF document text
    • http://torchqbfl.fun/raweb540e5.pdfIn PDF document text
    • http://repair-kompov.ru/how_to_open_lexus_door_with_keyltgt7.pdfIn PDF document text
    • http://mesanezedid.mypressonline.com/garanopasez.pdfIn PDF document text
    • http://7evenrp.ru/icebreaker_to_play_on_zoomnmmdz.pdfIn PDF document text
    • http://pojesuwemi.iblogger.org/enlightenment_thinkers_worksheet.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/tolivajupeku/64735169856.pdfIn PDF document text
    • http://naxadib.rf.gd/digital_marketing_manager_average_salary_london.pdfIn PDF document text
    • http://fajamoluw.epizy.com/31151992187.pdfIn PDF document text
    • http://muvavobijipege.rf.gd/al_arab_newspaper_qatar.pdfIn PDF document text
    • http://vubuzixefixa.onlinewebshop.net/wumexekeroje.pdfIn PDF document text
    • http://bukezodebas.onlinewebshop.net/89440437932.pdfIn PDF document text
    • http://zizenatoxu.myartsonline.com/jipexofuzoxokexibotoz.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/bepagugulan.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_off000121f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F2 5344 bytes
SHA-256: 330de707a9111c602164e285ba3d4619c951eb1c3e4bfc6baa3b729fa9e3bbe3
font_01_sfnt_off0001342b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1342B 12464 bytes
SHA-256: 142c39345069879ca35ec0fa234dd0f53b0240b90bb6d3e4c19b23c6c0dc0eef

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