Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4763e3bbee3d55…

MALICIOUS

PDF

66.8 KB Created: 2021-02-14 23:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2e0484189a20edb828cd77e8a480008a SHA-1: c3c7cfc0b226e71753e0f4cfbc3a430a915c0e6c SHA-256: 5b4763e3bbee3d551cbe9bcee0f8647edd70ef618cd9877118b7afa8a7f083fa
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://seumenha.ru/wb?keyword=b%20ed%20course%20in%20up%20application%20form PDF link annotation
    • http://scm03.ru/fishing_guide_stardew_valleyxpp77.pdfIn PDF document text
    • http://rameautbxy.space/vaziryhar3.pdfIn PDF document text
    • http://timelessdecorum.com/17373328775ob7nw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379844/normal_602711dcac344.pdfIn PDF document text
    • http://sendgrid-de.com/sales_marketing_manager_job-_descriptiono5a92.pdfIn PDF document text
    • http://strahauto.website/fotesagixuvalug21lk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410443/normal_60256e47ade44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380695/normal_5ffb92aab8ea0.pdfIn PDF document text
    • http://remontvorot24.com/crafting_guide_mod_minetestwk099.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/g1idaje/77014083467.pdfIn PDF document text
    • https://cdn.sqhk.co/gunobawiwax/M2jajbv/translate_spanish_into_chinese.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/bdo_witch_guide_2019tkan5.pdfIn PDF document text
    • http://itayoga.space/filoxubalodufiw86r3.pdfIn PDF document text
    • http://momentikshop.space/33351433842jeo57.pdfIn PDF document text
    • http://daravto18.ru/pregnancy_week_by_week_book_free_downloadayi8j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC749 5348 bytes
SHA-256: 7b63a98ef2817990c4d202ee7132f3ae4fd96365624e6f1b58fad3b3565d5312
font_01_sfnt_off0000d965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD965 10936 bytes
SHA-256: 86475084850dc3534d95860963cec87ea12cc5d21cbd3759c0ba476f09d33c2d