Malicious PDF — malware analysis report

Static analysis result for SHA-256 28751e76d89e5356…

MALICIOUS

PDF

71.6 KB Created: 2021-03-09 14:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e0b110025c77a758b9bcfce9d0bd0661 SHA-1: 7c6927db6b3b11b4e7743531bd38c49874612c36 SHA-256: 28751e76d89e53560f23637d47c3da0b259eeeb2ed9d36d29233df9f08cda3e7
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://jumiwimov.ru/award?keyword=ukhozi+fm+calendar+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/xunijejozi/lbwAhik/gigoku.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/ba1iaij/beautiful_places_in_the_world.pdfIn PDF document text
    • https://moxuzoketo.weebly.com/uploads/1/3/1/1/131164531/3583764.pdfIn PDF document text
    • https://faripolugariwel.weebly.com/uploads/1/3/1/4/131453512/wabikijineno-sanujoxut-loveb-gebeg.pdfIn PDF document text
    • https://widufosonetorif.weebly.com/uploads/1/3/4/5/134598319/a409a698c03.pdfIn PDF document text
    • https://cdn.sqhk.co/tonuviwa/gijijbO/35624194171.pdfIn PDF document text
    • https://xiligori.weebly.com/uploads/1/3/1/4/131411896/684437.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/cjb0Hih/broken_bones_bbq_colorado_springs_co.pdfIn PDF document text
    • http://losmopaka.site/arbys_secret_menu_area_51wfnv5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5fe9b6e965cee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_6024f7f724d7c.pdfIn PDF document text
    • https://cdn.sqhk.co/xavexapoxiv/jANKXhj/monster_hunter_rise_collector_s_edition_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/ifjdJXM/splashtop_wired_xdisplay_agent.pdfIn PDF document text
    • https://dewifekezag.weebly.com/uploads/1/3/5/3/135313931/rifuz-muwijure-sopetafanadugij-fetotaxemesum.pdfIn PDF document text
    • http://thehensleys.org/rozumhmuen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367925/normal_5fce936942d8a.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/650f72b6-2ef6-4162-9789-c8769dbc471f/swiffer_wetjet_floor_cleaner_refill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/042437f1-9a00-40fb-9f88-8540847f64de/romeo_and_juliet_act_1_scene_5_lesson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8013e031-aa1c-4e0a-b3b8-d86a9c8235a9/lazarillo_de_tormes_adaptado_capitulo_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84f06e16-c0e8-4a0c-a912-0206cfd0546b/what_epson_printer_can_you_use_for_sublimation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18523aad-8366-4a84-81a8-c89a3fd9afe5/96471310553.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1E 4404 bytes
SHA-256: 137c347a6f3a5febb68939c1d22b64819e9ab403adb543f6090ba7f41cbff838
font_01_sfnt_off0000d99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99E 5596 bytes
SHA-256: 62bbc149f4294bd962496ca5ee8a64ab0ceeff8225856a89d45b8c28638f3f94
font_02_sfnt_off0000ec85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC85 10084 bytes
SHA-256: 74802447ba2f6a0a3cbcc3244257135e93198430c88f4fbaaf128f12ec943d6d