Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c1ef7eb67e94be…

MALICIOUS

PDF

71.0 KB Created: 2021-03-01 19:03:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c8d7b6fc2d0edb71bfee46cd2d2f387b SHA-1: 1d4542fdf33d32b6eab38ad8dedf8333272397a4 SHA-256: 99c1ef7eb67e94bec441d33b4fa520a06307238b148cc30b1cbe0d63f3c0611e
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/award?keyword=area+and+perimeter+of+compound+shapes+worksheets+ks2 PDF link annotation
    • http://jumbochecker.com/imani_s_fafsa_forecaster_worksheet_answersgxo8i.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/who_can_fix_my_garbage_disposal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463554/normal_5fe4eabc9da56.pdfIn PDF document text
    • http://dsv-trening.ru/mewanemevolevisuo7fw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448547/normal_5fe0958f5fad9.pdfIn PDF document text
    • http://xenavowi.22web.org/challan_280_in_word_format.pdfIn PDF document text
    • http://cashbackmoney.info/ding_ding_ding_tori_bangla_kobita_collectionlzypz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475985/normal_6016de41ea16e.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/foxconn_n15235_vga_drivers_windows_xp.pdfIn PDF document text
    • http://inertbhjbj.ru/dasusukobebujuburalisunoq6ykh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/notuxaxologitavijobise.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/46021896586.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/emergency_medicine_jobs_central_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/ipad_stuck_on_guided_access.pdfIn PDF document text
    • http://kobukapun.epizy.com/high_rise_building_construction_safety_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/viwegot.pdfIn PDF document text
    • http://kagiweluxipo.epizy.com/likoloxonutubel.pdfIn PDF document text
    • http://padezaj.rf.gd/meet_your_spirit_guide_meditation_free.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_off0000d77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77B 5640 bytes
SHA-256: 9eec80de67f81a879b5d8e71b473211275dbcebd6cc5dd4a89e66887775c6010
font_01_sfnt_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 10460 bytes
SHA-256: f777927e570aafa77ef24d4782e72bf56ab3da4837924669eed76fcec79e1a13