Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a763cdd73999e4…

MALICIOUS

PDF

63.9 KB Created: 2021-02-24 03:25:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ab52957a92ff897a8a5b9f1b22eff8c0 SHA-1: 781488ee1f240a3df470a91e2aa0175e9b6bf7d9 SHA-256: 18a763cdd73999e42df7f4320e36b726ede1426860ab87230a7b12038d0a0a2b
186 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 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.
  • 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://jottigo.ru/wix?keyword=wave+speed+equation+worksheet PDF link annotation
    • https://cdn.sqhk.co/nupozifulija/pieiiO8/drifters_burgers_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/e0Yjbgd/dinosaur_carnotaurus_attack_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/fcgjqUk/drive_app_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_5fe7592a55d2a.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/gulofir_nutewalomomir.pdfIn PDF document text
    • https://gedotelebuguda.weebly.com/uploads/1/3/6/0/136050260/6929943.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/hahcshh/48509581162.pdfIn PDF document text
    • https://cdn.sqhk.co/kebisozakola/EngeNig/51288324297.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383128/normal_5ffccc5f524b9.pdfIn PDF document text
    • https://bosijoputa.weebly.com/uploads/1/3/4/3/134317673/2248102.pdfIn PDF document text
    • https://fekujize.weebly.com/uploads/1/3/4/8/134869517/2291894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503617/normal_600f02e02d539.pdfIn PDF document text
    • https://wosuletoxo.weebly.com/uploads/1/3/0/7/130739711/golenojolite.pdfIn PDF document text
    • https://pabaxovazat.weebly.com/uploads/1/3/4/3/134323574/makafofis.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/kinetics_iodine_clock_reaction_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/halloweentown_full_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/56958821520.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/blue_ram_cichlid_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/bosch_axxis_washing_machine_not_draining.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_off0000be17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE17 5372 bytes
SHA-256: d5382123945a3bb6e7bc243af7d8e1bb5a01334f7b44b4534a7119c05e88b5e3
font_01_sfnt_off0000d06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06C 9916 bytes
SHA-256: 9a896bd40e18bbdf419fcba9af8846744405aa4c61c8919f7bc4cd47266d5de2

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