Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b74e224cff1767a…

MALICIOUS

PDF

82.8 KB Created: 2021-09-03 10:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7e5b0090b3233f1974e45a169d146875 SHA-1: ff0f84925b5d2249fbb186addb36e41601efc594 SHA-256: 6b74e224cff1767a8fb2743ef33824c169302eecb4bda7ce15caf2f8882ce8df
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://chcial.ru/uplcv?utm_term=pyspark+complete+tutorial+pdf PDF link annotation
    • http://natproperty.com/userfiles/files/fonefufuzi.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/79fb064bf20ef1e7f7c4fb44d514994e/29780216572.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cafc61303---37324092796.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d42dd4d384---juxebukipegotepaz.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/lawepuj.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/40193047274.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/88391393622.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/tasofurogop.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/29170687527.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/8eklni61jnhnj65ne08631ha9i/76296481582.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/72047803358.pdfIn PDF document text
    • http://decaldankinh.net/upload/files/jinixilelonatarojax.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/pamenidejudoxalexutala.pdfIn PDF document text
    • http://tieclangman.com/Images_upload/files/wewilunigefip.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/21396735370.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/9fsbl8nai5r6e01q69v7jbmvgn/gisevulagufezakube.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/tunanexulegakuludogune.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7818c477d---basuzadifexuvino.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f69351d511---49774855243.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087dd7dd6e75---mudijojokav.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/6521907001.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/wivalimegomubad.pdfIn PDF document text
    • http://kleiberit.ru/files/file/nibuwaribovav.pdfIn PDF document text
    • http://dade666.com/userfiles/202108file/2021080710534870554.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_off0000db22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB22 10984 bytes
SHA-256: 0e81bfec935b92a360dcb4446253d4eec714bae784907068dbe9ba1a8a54d3d8
font_01_sfnt_off0000f4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C0 18360 bytes
SHA-256: 0898c6bd0a2993ae9f13cd6974599a69efa2124c242829f81f842b7aff804b8b
font_02_sfnt_off0001250e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.