Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af2514db0cd97d3…

MALICIOUS

PDF

90.7 KB Created: 2021-03-24 23:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6175935eb0f630b1adda57ed07344946 SHA-1: eff2fbc8eff50648c81060e9ca9ff207535098ad SHA-256: 9af2514db0cd97d39baefc871c4faa86a0d3dd52356dbb82aa47d743b4ec6d38
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 hosting, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious sites, likely for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/strik?utm_term=where+does+basketball+originally+come+from PDF link annotation
    • http://lepawumu.22web.org/adobe_reader_for_windows_7_64_bit_free_download.pdfIn PDF document text
    • http://masito.space/rilaxomanjodt.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/igh2Wjj/1025_dokdo_cleanser.pdfIn PDF document text
    • http://levelupguild.com/dimeterubaxiava3.pdfIn PDF document text
    • https://wokawopirajer.weebly.com/uploads/1/3/3/9/133999547/9076938.pdfIn PDF document text
    • http://instasurprise.online/can_you_read_two_books_at_once_on_libbykyid5.pdfIn PDF document text
    • https://cdn.sqhk.co/gutipefu/jeLnBgi/52399044632.pdfIn PDF document text
    • https://cdn.sqhk.co/wazuvegox/icjeZhi/56802535601.pdfIn PDF document text
    • http://trastqort.online/823104032937d1s9.pdfIn PDF document text
    • http://xudisoda.66ghz.com/visio_er_diagram_template.pdfIn PDF document text
    • https://cdn.sqhk.co/pigujoxexate/Ct4haH5/66048223037.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/zanisepolisolixux.pdfIn PDF document text
    • http://cetakchantek.com/aditya_hrudayam_stotram_in_kannada6fvlc.pdfIn PDF document text
    • http://lorebip.22web.org/sejoxisozez.pdfIn PDF document text
    • http://pifafixejizigu.scienceontheweb.net/73071154234.pdfIn PDF document text
    • http://vamefegali.mywebcommunity.org/body_parts_for_grade_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvamawijivef.atwebpages.com/voulez_vous_abba_sheet_music.pdfIn PDF document text
    • http://bolilolu.epizy.com/is_a_computer_programming_certificate_worth_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0689650-93ea-473d-907e-0ad083d7d09f/sojudejulekis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d71b3001-1a5a-4d6c-a618-7ce257bc7286/38383096846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80806acb-7981-4d1b-ae29-6810c03f68b6/zolapuxuliwaragifevonudo.pdfIn PDF document text
    • http://levigorofelo.rf.gd/slavery_by_another_name_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4929ffcb-5f4d-4539-bd42-50f074b2931b/how_to_get_3_digit_voice_response_number.pdfIn PDF document text
    • http://tifavamifikas.myartsonline.com/how_do_i_use_call_waiting_on_my_panasonic_cordless_phone.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_off000122dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DD 5752 bytes
SHA-256: 989f4457d2ab77442dc183a5c9144078108b0f9e5873d31408bcd689ed1ae039
font_01_sfnt_off00013660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13660 11288 bytes
SHA-256: 8b47993c30df9f0c318859c2215828aa7b73e856ee81852d84784400353542ca

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