Malicious PDF — malware analysis report

Static analysis result for SHA-256 531a577ee7620bde…

MALICIOUS

PDF

68.4 KB Created: 2021-01-27 12:07:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 54886b4a16141d5642cbebb3fe2c5857 SHA-1: b298166b0239c8b81b116540e741f4153bf57d9f SHA-256: 531a577ee7620bde4e82c3dc1a4232f760e4f50bbdc90f152118c8bb45f56743
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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/123?utm_term=google+new+sites+help PDF link annotation
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/bf1b052.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/GieOtEv/bounzy_online_hacked.pdfIn PDF document text
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/5776609.pdfIn PDF document text
    • http://betflixguvenilirmi.com/54641854357skfn8.pdfIn PDF document text
    • https://regisaralox.weebly.com/uploads/1/3/2/6/132681556/xupogo-zurexuvawad-mexeju.pdfIn PDF document text
    • http://puzigodemabotod.iblogger.org/makikunaxibemiselita.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/Che7Ihc/fijadagotirab.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/ERuyhbb/87111313673.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/kp3Ajao/mini_games_for_pc_windows_7.pdfIn PDF document text
    • http://legugoboxebepe.22web.org/flexible_working_letter_template.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/oZ0jcke/furia_de_titas_2_filme_completo_dublado_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jiporiri.rf.gd/broadway_engraved_bt_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/kekibokawaxumamakopejifaj.pdfIn PDF document text
    • http://jijetebum.epizy.com/medical_answering_services_monroe_county.pdfIn PDF document text
    • http://surotatifezuxe.rf.gd/jathaka_katha_kavi_bana_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_off0000ce2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2D 4900 bytes
SHA-256: 09d8e7193db1f163f68741f52b2b9bab0e57be761bd088cb9b928c8086272b03
font_01_sfnt_off0000def7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF7 11108 bytes
SHA-256: 98e39d89c2793452d68311730fba86efdf9f497da5bc99e4f976b64c1e5d5a76

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