Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ef2e2568121033…

MALICIOUS

PDF

84.4 KB Created: 2021-08-09 05:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7a197d58cc2a5f5d375a60d9216c4ccd SHA-1: 2d227d927eb8adedc016f9a465bf50c1e69d7d28 SHA-256: 32ef2e2568121033120c3991d8d77d8df2520c46990675b0f4d3b2fbd188a514
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a specific ML classifier and ClamAV detection. The presence of a 'Payment redirection / bank-detail change lure' heuristic strongly suggests the document's purpose is to trick users into updating financial information. The numerous embedded URLs, many hosted on compromised WordPress sites or disposable domains, likely serve as redirects to phishing pages or further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://archism.ru/uplcv?utm_term=what+is+modifier+25+in+cpt+coding PDF link annotation
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/8220690100.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac247ab027a---22838922014.pdfIn PDF document text
    • https://paperland.bg/uploads/file/jijanosejakegatenilozan.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160857b43210a3---lemezabezefagivora.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/21605691014.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/49950631159.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/8e7886e9690b49b6858a77c9e5255685/fafiduxukamugu.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de7334e2840---janovuxupudokokupen.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/161107ff7cb5f9---jilemuzilo.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/3e658ae71fd7dee47d8ac690b8717643/37150779350.pdfIn PDF document text
    • https://ptogel2.com/contents//files/minojizalitid.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/9763787108.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/46851804279.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/20646586404.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/famoleruvajusozutir.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/nidamukulilirofiturum.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/bogag.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8ab4bc110871fc15c0843ca9cf90c37c/80410511589.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608426d0dde47---10970018247.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108155d2980e---83012912624.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b921ebaf2f---pesuta.pdfIn PDF document text
    • http://hermangroupcorp.com/clients/3/38/389628ddbd62db2fa1e4299ecdfc1861/File/66535450576.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/tulizakasumexapi.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076261d89316---1089862366.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/pogixe.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a69d8a94ddf---sujukeremixofoji.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_off0000e3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3ED 11268 bytes
SHA-256: 542caad59d82c787021189e5fec02d39bcb5f681138a87cd3f47e8ffe42d0f83
font_01_sfnt_off0000fe1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11630 16992 bytes
SHA-256: 6304bb9091efb3929ee95303720e9f4e93e5becf6bd65e025a97540b79c0f5a5

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