Malicious PDF — malware analysis report

Static analysis result for SHA-256 04875d9b40d935a0…

MALICIOUS

PDF

227.9 KB Created: 2021-08-25 02:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d1bdb622f1e410ad003259e93218141d SHA-1: 72bb5545da7a8d29d964d7a31085be4b9d23a6f9 SHA-256: 04875d9b40d935a0c2746caa4907934869cfadccb1a852fe542b9f0e0566f1bb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, likely intended to host and distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan distribution campaign. Although no scripts were directly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content, likely a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9828

Heuristics 5

  • 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.
  • 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://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb45e8cca5---84286657108.pdf In PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/13d74d1ec6266bf93c4386d99c12dc63/47399307701.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/d4df6bdc1c41162b6bf968037957185a/17484137697.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/5cd623d8536fcab0d4972dfb341fe8be/72021426111.pdfIn PDF document text
    • https://miet.hu/kepek/34834490037.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/77k95roki60ds0tch92kj3c1p3/wupelimesizokazumot.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/fajujawoluseparopiduroba.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/vomigowoporonid.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/vefaxumetaj.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f666ead9063---jorewizegudilisigilidi.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/29405437623.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2645ead4---mogeroke.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00a3550020---42398156819.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/pepofozamogefobevu.pdfIn PDF document text
    • http://vuadiemtayninh.com/hinhanh_fckeditor/file/vomekibepuromukakubalir.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/molar.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/zokeso.pdfIn PDF document text
    • https://heyratacademy.ir/file/kilomimonavenojovuxawave.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16092530db1a8f---nimitizobovorulokoke.pdfIn PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/21697675403.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/kozomemajikebikaza.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/tunosazuluxexowamatufote.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/585692f5c6c4d980bf419980d16b5d09/80438722565.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/xubegovodirinulo.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf436a552fb---leran.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=psion+5+manualPDF link annotation
    • 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_off00031fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31FB7 18932 bytes
SHA-256: 4d36b43ff6dc261ed8f5c5b2e663b196e07a9c9a7bf467be5bfd5648494254ec
font_01_sfnt_off0003529d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3529D 10176 bytes
SHA-256: f7a4aecc58ec4b4ec289125aafa0612f09091d2e4305ad543fec8067d6a971e3
font_02_sfnt_off00036959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36959 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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