Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5d2af7e5985b60…

MALICIOUS

PDF

91.1 KB Created: 2021-08-27 02:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 653f3c455c45137a397a7dc944681a9d SHA-1: 6d8df9264e651586562f57269a2c6442867c0eb8 SHA-256: ed5d2af7e5985b6043cef1562fc8eb965fabcdd66a55081aaec7a4ea35133158
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates an attempt to distribute or host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://inwebjor.ru/uplcv?utm_term=process+of+sperm+to+egg PDF link annotation
    • http://akkoryazilim.com/userfiles/file/32544965052.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/30181255129.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/25614489715.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/0b832e216606c6191eb3abd0a9714131/7081676289.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/477b321950afa997694ba1d6233c1942/tuxuzegezenepoja.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccdfb6c56a---lixilozatugazut.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e1ef5c9b4---fuzofupogekizemuxipakabus.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea373cc398---30418493305.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/4676179909.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609aac3c4f801---nodimozafagejosoxo.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/9cc8b6c1ec0a53c23ba27ff73899f360/91590281912.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/082f0bd215a208586d2e350cc1850fe3/wolurebew.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/d4aafa01bacc8982c77bc6659689f401/39084976576.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1607c126116ea3---xudefawemidovudom.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/13491564552.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/ba5fde19dfcd5608008db42d2b3aee9d/zuziw.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/67830345938.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/zunaxokavitobijuxojo.pdfIn PDF document text
    • http://mextro.de/upload/files/ruguturezo.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/jorefifaxijupuva.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942fc5c5a66---kelenadozixezenalaka.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/ranexanipaxukadalulilu.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/92385226888.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://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_off000101f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F5 10420 bytes
SHA-256: b8d8bbf70631f82766a215178aac3b4da6369778b99d6751d1d57aa38f9270b0
font_01_sfnt_off000119a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A1 17360 bytes
SHA-256: ce1f7466f3828d74ba9e5a48e8f5aba6a1204010710643eab1e60a5d85d6e813
font_02_sfnt_off0001465f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1465F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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