Malicious PDF — malware analysis report

Static analysis result for SHA-256 c266f181e4e2d40b…

MALICIOUS

PDF

98.9 KB Created: 2021-04-16 08:40:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 853def24894b6f760684ca64e424551a SHA-1: f4b2de56cd733b1bb466b87345f50f10bb8da62d SHA-256: c266f181e4e2d40bbbbc70c72598bed56cb8487bd62ec1ee5bb585d37c0afd70
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically pointing to 'maypoin.ru/strik'. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan. The presence of numerous links and the use of disposable hosting suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://maypoin.ru/strik?utm_term=the+hound+of+the+baskervilles+key+characters PDF link annotation
    • http://gefosezidubajoz.scienceontheweb.net/canon_pixma_mg5320_wireless_inkjet_photo_all-in-one_printer.pdfIn PDF document text
    • https://dowebirajosem.weebly.com/uploads/1/3/6/0/136010559/4389711.pdfIn PDF document text
    • http://lamanixumerad.mypressonline.com/kodig.pdfIn PDF document text
    • http://pek-24.cc/wimpy_kid_characters_drawing_step_by_stepzvfsl.pdfIn PDF document text
    • https://dolilufaxeni.weebly.com/uploads/1/3/2/6/132683246/fisedo.pdfIn PDF document text
    • http://dazavaluk.mygamesonline.org/aprende_ingles_facil_libro.pdfIn PDF document text
    • http://tophomework.space/metodos_de_estandarizacion_de_recetasxugqy.pdfIn PDF document text
    • http://freshka.fun/soil_mechanics_formula_sheety3pq8.pdfIn PDF document text
    • http://lenorimageb.iblogger.org/38197212817.pdfIn PDF document text
    • https://tukadivi.weebly.com/uploads/1/3/2/6/132695248/dakenilulox-datozafug-gunubigabo-lesuwovil.pdfIn PDF document text
    • http://pararapameso.getenjoyment.net/52329913445.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/how_to_connect_dish_to_apple_tv2rq4r.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/6617255.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feputuwi.epizy.com/bamodufa.pdfIn PDF document text
    • http://ritofeli.epizy.com/embracing_change_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae3046d-1505-477b-a625-7230ead6b262/bowaxifopefenozuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87be9c51-fb45-4e5e-883b-1be478c4ffda/gitominerered.pdfIn PDF document text
    • http://gujalitez.epizy.com/vishnu_sahasranamam_kannada_lyrics.pdfIn PDF document text
    • http://zuxakenupe.epizy.com/vugotafadeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d77d945b-cb1c-48eb-8d99-e758afb2bd49/how_to_make_a_dd_campaign_for_beginners.pdfIn PDF document text
    • http://poborunedajemo.onlinewebshop.net/bexafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f1a69ed-a05f-4c5e-8225-743d4abbe162/50287921138.pdfIn PDF document text
    • http://weragugu.rf.gd/finowos.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_off00012ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADA 5416 bytes
SHA-256: e28aad2de328708761f273a5b5b5691d07cb40ff7c621f3c7ac31ff4c44b6a67
font_01_sfnt_off00013dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCB 5424 bytes
SHA-256: c9b9d4d56c01b099bfaeca4641bbebf4d38eac08ef8f94269a8d6c868a1c88d4
font_02_sfnt_off00015045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15045 14596 bytes
SHA-256: db379839828c5eec29204b9aee6b1f47773f2032149c815b04744739dac87442

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