Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c26b470a49e3cbb…

MALICIOUS

PDF

114.2 KB Created: 2021-09-03 23:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0a601703e49063376d05a53784de7039 SHA-1: 33a04b58fffb47e304e681b3d83039080ba0305c SHA-256: 5c26b470a49e3cbb7abc70dc8cffcd1f72d2073e16b6b13a7478b464c0bc431e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress sites, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/611315306a55129de22ae2c4b114ab24/nuwiziduralugukepi.pdf In PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16072b273a0e07---65919723466.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/35a5ddc72524fb58af1ac1aa8728e4ee/jemidofowamibolupeg.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/damazuwapudemot.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f84fbc0052e8c1c6467c546883804d12/20531723764.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a67f1c38318---93081553022.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/pesofapesagizumefa.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/mewibobil.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/m1jbnoopf29adk0c1esbnob3qn/gigela.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ad2aecq47p8g2fgvchtmoor5a2/39043053337.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/debobax.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfa301ac05---69264798731.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/5cc8c8f4ba1f148aaf527aa06ea17332/75763990554.pdfIn PDF document text
    • http://myqself.com/upload/files/73793438556.pdfIn PDF document text
    • http://myagreement.com/UserFiles/file/juperagamukodegemu.pdfIn PDF document text
    • http://bio86.fr/fichiers/86479549244.pdfIn PDF document text
    • http://santeh.md/img/files/4992296736.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/dunapupesirekibetipumuraw.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b000042db0---buzisibaso.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a28d4f477d9---kevamukukosixi.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210610064957961.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/zakexunufel.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/bixegubiturapufoxaxelo.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a42c0114103---19524361368.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=direccion+estrategica+garrido+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000154d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154D1 10752 bytes
SHA-256: 5cc1e90056a99ea3cd8eee79adc1cfc978aca3b0b10ca0b70b353af38c47eaba
font_01_sfnt_off00016d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D75 21052 bytes
SHA-256: a49f1097457bc22dd45447ef12e05474a7a0595ea22798794358ce264eab2584
font_02_sfnt_off0001a2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.