Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ee24649eb185f5…

MALICIOUS

PDF

76.7 KB Created: 2021-03-20 21:10:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 950455ab14241cd2367a57d646ee58ae SHA-1: 202d01f1723263d63ba4cb940c620f52986d9ea8 SHA-256: 20ee24649eb185f5e3487ca452c267040302eab78eaae077e03c4796f34a92c0
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically pointing to a URL containing 'how to win at forex every time' and a 'strik' path, suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although 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 0.9998

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://midufefew.ru/strik?utm_term=how+to+win+at+forex+every+time PDF link annotation
    • http://sokegex.mywebcommunity.org/25330514487.pdfIn PDF document text
    • http://arnautmebel.ru/kenmore_elite_dishwasher_model_665_not_workingmp5s3.pdfIn PDF document text
    • http://pokovata.scienceontheweb.net/makalah_bahaya_narkoba_bagi_remaja.pdfIn PDF document text
    • http://pakisonuzaruwav.iblogger.org/chaya_mat_chuna_question_answers.pdfIn PDF document text
    • http://shtampshop.ru/kadodepivibepakebepexiruj60ox.pdfIn PDF document text
    • http://zumedemuruva.22web.org/cement_manufacturer_s_handbook_peray.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/sun_and_moon_starters_in_sword_and_shield17h5h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jemukiguwuw.myartsonline.com/raquitismo_fisiopatologia.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/97097663613.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/platformio_serial_monitor_example.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/sinupugosakubamixibozos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd9c14d7-0be0-4a06-ac5e-0eed12670229/43880280409.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/child_of_god_in_hebrew.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/bollywood_songs_whatsapp_video_status.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db7af74c-1474-406b-b895-c26e999a8169/41109344539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0360c7cb-5349-433b-91e8-18d0b3e3e141/cursos_de_ingles_basico_online_gratuitos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b9cc72-96cf-4ac2-a398-8be8a326d978/79887509607.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/wegijojajogujupupowig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4eea775-9930-4cbe-ad41-f4ea38a23598/how_to_calculate_natural_log_in_calculator.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_off0000f20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20D 4988 bytes
SHA-256: 60f5e6aa2a23c2f4cafb928a1b720e5734768737bfeba0c792c760d6c5907b47
font_01_sfnt_off00010310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10310 10060 bytes
SHA-256: 20092b9efd606caaef949fc2738cd0d2793bcf9d01d634718924fefe73735c06

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