Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dac7ebb023b26bc…

MALICIOUS

PDF

72.0 KB Created: 2021-06-27 18:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 88c584db769d50250e5e87c7445dc5b1 SHA-1: 4fdc51233bd3dff3ed4de3b2ea33e6aed1ea1df2 SHA-256: 3dac7ebb023b26bc28343f60621d3b289616501d05ab12cf93867368be31206f
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis revealed that the PDF contains a link farm hosted on compromised WordPress sites, designed to redirect users to potentially malicious content. The presence of multiple distinct hosts and a high number of links suggests an attempt to obscure the final destination or distribute phishing lures.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4683

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.
  • 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
  • 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://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/597aae0d20b1c1e609095be9c5e102cb/kejulirufatovunigabako.pdf In PDF document text
    • http://autohondl.cz/userfiles/file/35731692522.pdfIn PDF document text
    • https://abeess.com/userfiles/file/97393878802.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/mr2nigs1jum34jg1smht10vev0/fejidu.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098764fe31fc---mipok.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/bcfe13ffabbf234738c8b200ad360e5f/12002234169.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/17612905672.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-17/20210517122848212608.pdfIn PDF document text
    • http://simonide.org/userfiles/file/bokebeforugokija.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/retuvodunuwimo.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e14c91836---gubevudotewusukuge.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8412e8c568---56586327686.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/19783921673.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/gojasumebeb.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/91321139147.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/13639583769.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/kt7p2q4kdpl7tv46tq1v31a0oe/6830578778.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cc619b1c5---foluwofumanafapeladifupa.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/60f53080ab86506b8335343419647b7e/94636591007.pdfIn PDF document text
    • http://geniuschulatutor.com/userfiles/files/zitop.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085498331b66---1106931672.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/ao3det3sgof8qmk3no6eojo39e/81351071601.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/xefutizasosolusajade.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=canon+in+d+piano+and+cello+sheet+musicPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD931 17192 bytes
SHA-256: c4a7b0ee689e965800c22645c2ce11f0b8836ae0af9e622a375dfc1a25478c8f
font_01_sfnt_off0001064c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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