Malicious PDF — malware analysis report

Static analysis result for SHA-256 babf6dcf61206783…

MALICIOUS

PDF

75.6 KB Created: 2021-03-24 18:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 97e11b10a047557b22a60a946a3f7e02 SHA-1: 1c902bb125269c43e3ee8220be6988bfeabe6931 SHA-256: babf6dcf61206783cab5c8a6db22546384077c0da006b34ca1e1d955c3ad7859
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, 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 content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=how+to+find+work+for+my+dump+truck PDF link annotation
    • https://cdn.sqhk.co/numavagoko/hcgcioP/88480811566.pdfIn PDF document text
    • https://cdn.sqhk.co/fixuzigetir/gwBgfih/masapatebumu.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/nafes.pdfIn PDF document text
    • http://mumijivamivaxij.medianewsonline.com/antihistaminicos_h1_de_primera_generacion.pdfIn PDF document text
    • http://pezozolagipiv.22web.org/csr_racing_2_guide_tuning.pdfIn PDF document text
    • https://cdn.sqhk.co/pifizumux/haYXHig/todovenodofavisoweki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_603bfb2db0678.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/ibgftjc/georgetown_cupcakes_recipes_vanilla.pdfIn PDF document text
    • http://werewinavif.22web.org/25403073400.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456134/normal_60013457e55bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380223/normal_5ff27ec964f06.pdfIn PDF document text
    • http://fibilif.iblogger.org/73579363983.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/aptitude_test_for_entrance_exam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddecabf1-493f-4668-8f74-c9491bde7702/susemigupijatukodebi.pdfIn PDF document text
    • http://tavudedenudisuj.epizy.com/46050278045.pdfIn PDF document text
    • http://jekoradamotud.epizy.com/98909643381.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/zekepojose.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/ardhanareeswara_stotram_telugu_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f21816a-32f2-4ba8-abde-b894f9ebe494/glacier_bay_shower_faucet_repair_parts.pdfIn PDF document text
    • http://vilaxetewutino.epizy.com/kegipirepari.pdfIn PDF document text
    • http://tiwufuwivuvuf.epizy.com/95947966423.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_off0000eb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9F 5100 bytes
SHA-256: f2783fb94ba5c075cb6c2c792c24976c484f2a6973ee88eb2a27cf991b631127
font_01_sfnt_off0000fd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD01 10544 bytes
SHA-256: 64a6b299e412053bf009295683e649818d38b56e711a6e0a143666532ff68171

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