Malicious PDF — malware analysis report

Static analysis result for SHA-256 d84b330070af0ff5…

MALICIOUS

PDF

99.7 KB Created: 2021-09-02 11:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: efff44c49b3b44a167d2af1202ad4912 SHA-1: 446b6e29820c2aa002dbf6ba1f429e5b66fc17fc SHA-256: d84b330070af0ff5d0106d8596ab7b78cf1ceee8fc72a0ec9a5cf81ebf0a68ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, with no readable text content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chcial.ru/uplcv?utm_term=gestalt+therapy+fritz+perls+pdf PDF link annotation
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/1d8dd7cef717377793c9c2dda94dbe47/nijafi.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/38127774277.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161153d39c5db8---nibalajopikupogipepap.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/e807515dcc1747147f4f67f3b332531a/darir.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/6c7154294fec8c56eb620bca175a78f5/80903320278.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/jakevokufubomedub.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/libefubujava.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/88800283433.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/82901668840.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/bowafilopil.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/f6c60e9ada25a9db9310af7fe6e4c952/zelalofigenar.pdfIn PDF document text
    • https://aqua2go.pl/galeria/file/daketozuxuwisafeduvek.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dac6d888a---56362070141.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/61447df21c61a2846d4114a8e7b6a809/54353802520.pdfIn PDF document text
    • http://www.heksan.com.pl/file/kefexasavoni.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/winumixemivu.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfa6f04e84f---85204643682.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1633d34a28---ziwekunipedakijif.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/27dc0219abf8f0299df3bbb6d11ce3f8/nanofosorexilonunofogu.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/1fl9u9rtbrc4bgqrns4540sj01/72087938942.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607002dd80bae---31708348017.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/65819298195.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_off000120ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FF 18576 bytes
SHA-256: ec6b48fb29adab60a89c29d9db47dfde9e53079fdef0986ce73a3f368474504f
font_01_sfnt_off000150ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000168c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168C4 10584 bytes
SHA-256: ecec8dd49ee488aa8b45dd7c4cb90c47f84aa38ef69b06c7b6caf65f21e521ad

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