Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7abd6384a7a30e…

MALICIOUS

PDF

80.9 KB Created: 2021-05-25 09:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 801b4fc3aebb9447143bccf80178d055 SHA-1: 44cddf4b17f0b1b666fd2f4ec7472a7cbe6d0157 SHA-256: dc7abd6384a7a30e6708bc8d5e6833da9bf78b9d4703392f49e49b66b0521826
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of a 'download button' heuristic further supports the interpretation that this document is intended to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=adobe+premiere+pro+cc+2018+title+presets+free+download PDF link annotation
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2a63b9888---69204422327.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bcc921a6f---sitilakabugenezut.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/7a582i3ingg5444lstv8eaa5v5/bubazawexonerajakesaf.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/bowetusunaxefa.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/tuzimabuvuvuborume.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/rijajemaxepijavifejofeke.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc527a2f69---54238176108.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7d7c4395a44ac5cde9b8b4a67a790022/jomawefotaw.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608a48cfc66c2---lunosekedal.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcbde5904b---febokukavesokemu.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/696780ebaa4eff7ead19f8b27f3c9c5d/16641707052.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/b0a44fd0b0999cfdeee224322dbd6fe2/moneroxosafodiduv.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/77241857338.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/ff9236ecf57be0a2a92b25ea17ea1a74/xojamebegiwesezebixedaj.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7b98c9a3e---suduritonelov.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e81bf42c76---gixizufejusefupe.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160964d9d32da4---pebubo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5A 6040 bytes
SHA-256: 32c68e116d3472cbcc24cd2b062d6dd84788f30ffcfc710b9b31cd072fcfc90b
font_01_sfnt_off00010fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE5 10656 bytes
SHA-256: a88d51571a2d07d284324e89c316e841d00d73344b1a6eaff2604a1f6cdceae6

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