Malicious PDF — malware analysis report

Static analysis result for SHA-256 18cff3b91f54d884…

MALICIOUS

PDF

83.6 KB Created: 2021-03-07 19:39:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ba18af0789e0ce283b0e7510f3e5cccf SHA-1: 3cdca3fab02e919013d9e7dcc17cb012b45652ff SHA-256: 18cff3b91f54d8847a5c445cdc8f63374ddcba6f517926425ec14593d50bc952
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://kuzutuzo.ru/123?utm_term=bosch+nexxt+500+series+dryer+start+button PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471704/normal_602c4a18382a2.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/iso_27001_password_policy_template.pdfIn PDF document text
    • http://xunarepozufuz.mygamesonline.org/furinno_abbott_corner_computer_desk_with_bookshelf.pdfIn PDF document text
    • http://fibipowokogo.sportsontheweb.net/86923730816.pdfIn PDF document text
    • http://ririzobe.medianewsonline.com/instep_bike_trailer_parts_walmart.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/75817574588.pdfIn PDF document text
    • http://jijoxep.getenjoyment.net/sloan_flushmate_503_keeps_running.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470683/normal_60201b33ca824.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/what_is_a_good_300m_hurdle_time.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_ed33ffe4984d48bbbbccfbca6e848a18.pdf?index=trueIn PDF document text
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_a24952f993d046a1bd5dbf0b5994d672.pdf?index=trueIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_d024b441e2d84f51bcd3f3d01ec1a787.pdf?index=trueIn PDF document text
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_cd71bdc6a067444fa07563cdee0779ef.pdf?index=trueIn PDF document text
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_9ee05fc9adfe4ef5b0e74be277e0aaa7.pdf?index=trueIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_8f5692805d674f8eb3c87ef468e816b5.pdf?index=trueIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_93dbb16832bb4fdeacdddf4eec57a631.pdf?index=trueIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_e83fed2cca0a483d84d5fced748dd46f.pdf?index=trueIn PDF document text
    • http://xowilewegiwo.myartsonline.com/steel_magnolias_script_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_off0001054d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054D 5620 bytes
SHA-256: 964da88bdbb9d10061da35e42b3d33a95aaf68de9c75478ba1b5d1d6a834581b
font_01_sfnt_off00011872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11872 12020 bytes
SHA-256: 6d12c2400e871dec04caa1c69753417d10c2f78635cc2f57b1828df65b3b83b8