Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b8efabe56b18af1…

MALICIOUS

PDF

76.4 KB Created: 2021-03-19 09:31:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 73fe1c5563d3b91a064b644aa91304ff SHA-1: 59ed57957336debeeecda56381f59412cf1a7823 SHA-256: 2b8efabe56b18af1a3cc82ab591187e34a57b312fa55b5652e6a8399dfcc7047
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one prominent URL pointing to 'soxebez.ru/award', suggesting a phishing or malware distribution lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious nature by identifying the PDF as a link farm on disposable hosting, 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://soxebez.ru/award?keyword=livro+amls+pdf+gratis PDF link annotation
    • https://cdn.sqhk.co/pigevikuwi/Mhcgfge/zigenage.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/pathophysiology_of_hearing_loss.pdfIn PDF document text
    • https://cdn.sqhk.co/tezakagadol/Zticsid/printable_movie_trivia_questions_and_answers_2000s.pdfIn PDF document text
    • https://cdn.sqhk.co/dajusonas/cgjdhiD/instagram_app_download_for_iphone.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/kojixuxavigisipewur.pdfIn PDF document text
    • http://fipizilemuwob.medianewsonline.com/59963705451.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/bIZgfid/swat_season_4_release_date.pdfIn PDF document text
    • https://pudoxarunisit.weebly.com/uploads/1/3/1/1/131164251/fubosoputalunuveto.pdfIn PDF document text
    • https://melugazeso.weebly.com/uploads/1/3/1/1/131164252/23325.pdfIn PDF document text
    • http://trokot-online.xyz/jekekidapees2eg.pdfIn PDF document text
    • https://bazubipevudupu.weebly.com/uploads/1/3/4/8/134876407/lokeloresanuxapiret.pdfIn PDF document text
    • http://medicinfo.online/k_nguyen_huy_n_tho_i_hackoap55.pdfIn PDF document text
    • http://vumajufeboxidik.mywebcommunity.org/centralized_planning.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rijonitapadon.myartsonline.com/3055476624.pdfIn PDF document text
    • http://xawixojupaxixan.onlinewebshop.net/makejotomubup.pdfIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/maquina_de_coser_brother_lx_3125_precio_mexico.pdfIn PDF document text
    • http://tiredosutozol.atwebpages.com/albert_camus_plays.pdfIn PDF document text
    • http://buzumigasox.myartsonline.com/86709617306.pdfIn PDF document text
    • http://dogiwexor.myartsonline.com/rational_numbers_on_a_number_line.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_off0000e72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72C 5364 bytes
SHA-256: 90a75533d9d7279054cd94d4e42fe6a7420c5429fc37b9dff264f5e142633dfb
font_01_sfnt_off0000f961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF961 13960 bytes
SHA-256: be7810d6893b40146727afe452ff272d508ac5edf4228f4fd61d391ef20a9ac6

Open this report in the interactive analyzer, or submit your own file for analysis.