Malicious PDF — malware analysis report

Static analysis result for SHA-256 111e0f84737a2215…

MALICIOUS

PDF

107.6 KB Created: 2021-06-28 06:35:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 03b6ad1f382b9a618baa0483cb9e2b75 SHA-1: 8e5b96170c6e7043c8493f19a99e7fb4790001bc SHA-256: 111e0f84737a221513cdadafd2face9e7d1ad4abbe0e960f22c6b52a02a70ed2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely used to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://allytemp.ru/uplcv?utm_term=there+is+no+exquisite+beauty+without+some+strangeness+in+the+proportion+bacon PDF link annotation
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/86e248d534456b723cdbbf7ca1183b7e/vulafipukiko.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdb6ce4c00---68506224660.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094afc044162---kejesatamike.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072104cd6df6---40460273709.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/fuxinudezufulomazeze.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/bomakedipoteru.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/lojatifikepagoguxabodidav.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608052d5270eb---fafamot.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/5d6103fd3f41fa52c7b26ef865205517/64373668804.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/nusodotesada.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/zinepivazemeguxibisaza.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccd636b5095---35257102037.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/nkgh3tmiqsvp7f5096arnv2vjr/wefamevepafiwenazozula.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a0ca3543e---dosere.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/d43363c7f7cac3c4a309244e44949dcc/99464948896.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a544b90a088---monajoja.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c58e5e4d7---japikojapigukugi.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/35f183a6f353a8fc18dcf14aeedac498/xikakumogedazu.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/12396995364.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/1ucps9cckd3g3urhf05hrq1l01/lanufenugesotanuxube.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb3e15a94c---nanax.pdfIn PDF document text
    • http://mousike.it/img_ins/files/67550293615.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_off00013ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFC 11428 bytes
SHA-256: 31cbcd7cfaf6c12d4fa0c8dc9c1938e315b220bce7ddaf7cb02c3da95c26fa38
font_01_sfnt_off00015a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A64 17000 bytes
SHA-256: 49d89f7876ad138f6616d0c281850ce3f89f8ae70ec3d647208ea7f75e4bb77b
font_02_sfnt_off00018622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18622 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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