Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b03bf4516221039…

MALICIOUS

PDF

71.4 KB Created: 2021-03-05 17:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d32d55092ee4a739ad54d585737da4b1 SHA-1: 1e413e9da726fbcf06f8d578be950570c4c3a768 SHA-256: 9b03bf45162210398cc3d3d35988e79382b3841f37b3211b73885308608f70ca
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. One prominent URL, 'https://soxebez.ru/wix?keyword=dogs+for+sale+in+oklahoma+newspaper', is presented in a way that mimics a search result, indicating a potential lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/wix?keyword=dogs+for+sale+in+oklahoma+newspaper PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426425/normal_5fdd36f8d1ee3.pdfIn PDF document text
    • http://gafegenuwegapok.iblogger.org/zisejufo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470029/normal_5fddbc3179356.pdfIn PDF document text
    • http://xunajoza.22web.org/black_history_movies_on_netflix_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393499/normal_5fdec2cc6699a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464873/normal_5fcef9dc96f25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409420/normal_60138baf8f1da.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/12438cea-907a-4d4b-a7c4-8baf1e5f89ac/golds_gym_treadmill_480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69aa2ebf-54c4-4bf2-b87e-25401de8d95f/33640333747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/773e79ba-e668-452f-aaf8-218f4140ca07/enfermedades_que_causan_picazon_en_todo_el_cuerpo.pdfIn PDF document text
    • http://misugivunuzu.epizy.com/descargar_commandos_2_para_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/812fc96c-24e6-4daf-a401-4f0ebf08c4b8/quantitative_methods_for_business_anderson.pdfIn PDF document text
    • http://bemuvubovewe.epizy.com/brain_teaser_printable_sheets.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_f180d4e8fe9a414999253a69c3329ef3.pdf?index=trueIn PDF document text
    • http://xedaripa.epizy.com/android_auto_mazda_3_2014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ffd6d5f-f5d7-4b04-b94c-8f60d441d7a0/los_7_habitos_de_la_gente_altamente_efectiva_presentacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15847013-82ec-4efc-ac28-650fa192770b/slaves_to_darkness_start_collecting_assembly_instructions.pdfIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_bdbcae02738c4af9b00d5486fdc529f5.pdf?index=trueIn PDF document text
    • http://vajubugi.epizy.com/finders_seekers_answers_london.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90de1c3e-26a8-4fb3-8130-f984d7c4f845/grade_2_english_worksheets_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1961bea-6807-401c-a076-8c3a340d70a2/behringer_xenyx_q802usb_multitrack_recording.pdfIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_6ea27005925341c3a833045cada9615f.pdf?index=trueIn PDF document text
    • http://kubivakov.epizy.com/20892245716.pdfIn PDF document text
    • http://deroselewem.epizy.com/forgotten_password_on_excel_2010_protected_sheet.pdfIn PDF document text
    • http://nalakakowim.epizy.com/65735112555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46822b05-4cdd-4da7-8f25-600639bb224a/rigifijafes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/771592f3-ffd7-4af8-80fa-2b720a2de2be/56753905636.pdfIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_978b64f0851d4cee81ee495063137d8e.pdf?index=trueIn 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_off0000d956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD956 5468 bytes
SHA-256: d0262110dd92be8eaf36e30bf9849b555073fe9f972c893e352c94c3d71d6fa7
font_01_sfnt_off0000ebe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE2 10512 bytes
SHA-256: 18b8ad45e33c0f169e4658167856ebb358a65dc1e3be9d3411c78247847b6c1d