Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6330bc6e6bfd44…

MALICIOUS

PDF

96.9 KB Created: 2021-08-03 11:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ba9266d78c2ddb7b5d7e07b537c70476 SHA-1: 29b712838a223e8dbe9f4012e52d2fc56d501699 SHA-256: 3c6330bc6e6bfd444ec6561522e1db930e82d2a7a4cfb60fd10709c241d35d61
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. Several heuristics indicate the document is part of a link farm hosted on compromised or disposable domains, suggesting an attempt to distribute malware or conduct phishing. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab145bd6fa---72984655999.pdf In PDF document text
    • https://gw21.ch/uploads/userfiles/file/sozatusinepavekutavatada.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/wabarudepipitegopus.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/kibitujixulidexisus.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-07-03/images/files/vinalalenomegunilazuwuti.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/8950625552.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/suponezejazekadem.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/5133520726291ce965ae50ea1d4d4986/mevizuxap.pdfIn PDF document text
    • https://vleek.com/uploads/files/64499395732.pdfIn PDF document text
    • https://vpmemorial.net/images/file/29486024220.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210713205337_zl5rve.pdfIn PDF document text
    • http://www.erealitysolutions.com/tennisontario/assets/appsadmin/js/ckfinder/userfiles/files/32514762798.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b854ad4ad92---pepofozirosagofifizalu.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021051034759_24024101.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/53085154712.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/d6e8b9001467a6e920e45b174f8a0357/moledaxovov.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/dulivesokijabevepa.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/icue67p3ulabrdedpvoosrftun/42914807461.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/85519304132.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9088630ce---nizetudimexapafixojo.pdfIn PDF document text
    • http://esejsc.com/upload/files/73417839003.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c9699df85---punof.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/a18088a6819333538717c7a937c41199/65930108519.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/ddanm6d4o357rops4lc38lkpit/sukanakakoronapu.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/59529415965.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/969dbded6149235f65005a7858b58284/98160830969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=kenmore+oven+parts+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_off000119a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000131b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B5 17092 bytes
SHA-256: a19e96ae5b8be282e2b9d6e9d208d218a69e96397ea01011091207ef22916327
font_02_sfnt_off00015d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D8C 10476 bytes
SHA-256: 73f68b2f8039c45ba789a502a7c513a0272592046722c54826f2381768d0c1cc

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