Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec872ce3cc1fba2e…

MALICIOUS

PDF

70.0 KB Created: 2021-03-23 19:31:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 99b4733530828957ee3af10f065542a5 SHA-1: a9298146aa18422ff45896136e2d81f71b50d5e2 SHA-256: ec872ce3cc1fba2ec5ea699787e33f49badb5dce6843cbccde45b1dd8acaef3a
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/award?keyword=the+scarlet+letter+oxford+bookworms+stage+4+pdf PDF link annotation
    • http://nafepuzemobir.sportsontheweb.net/mapa_geologico_del_peru.pdfIn PDF document text
    • https://merogowaxoku.weebly.com/uploads/1/3/1/0/131069891/godivapobozef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407729/normal_5fcacde5f1fce.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/wapolexozakolalamawekiber.pdfIn PDF document text
    • http://gopidap.scienceontheweb.net/80823880229.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/63312858795.pdfIn PDF document text
    • http://xonigej.mypressonline.com/88956235419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460058/normal_5fd62a7a56bf1.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/51796107496.pdfIn PDF document text
    • http://sowinod.mywebcommunity.org/english_grammar_worksheets_with_answers.pdfIn PDF document text
    • http://wusator.mygamesonline.org/povugavimifadawegugiviz.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/how_do_i_pay_my_dish_bill_by_phone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453129/normal_5fc74e65e0dc3.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/watch_beowulf_online_free_hd.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/9340376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455195/normal_6028a3f613754.pdfIn PDF document text
    • https://gumomerad.weebly.com/uploads/1/3/1/8/131856086/dagunor.pdfIn PDF document text
    • https://durajonuz.weebly.com/uploads/1/3/1/3/131383269/jipuxobed_bagej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvuzonixo.onlinewebshop.net/mawijodanolitemogeg.pdfIn PDF document text
    • http://fazatela.myartsonline.com/11456357941.pdfIn PDF document text
    • http://wemaxoseni.myartsonline.com/lofufanite.pdfIn PDF document text
    • http://gezixus.myartsonline.com/what_are_the_different_shots_in_film.pdfIn PDF document text
    • http://bidusibebawuz.onlinewebshop.net/thoth_tarot_deck_review.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/fojomovugapazafal.pdfIn PDF document text
    • http://wegugoleta.onlinewebshop.net/71552865456.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_off0000d274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD274 5972 bytes
SHA-256: ee47915c28c198c9f731e611198b1c0897be934d9dd79477685c431d421729c1
font_01_sfnt_off0000e6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BB 10476 bytes
SHA-256: ff942ea616fa69b2ef8319f027891e0d644a689277c06f7519841ef2132c8bd4

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