Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e20b591093c8a5f…

MALICIOUS

PDF

70.7 KB Created: 2021-09-06 08:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 38eab8c30c4e63e697b6c84acd06112c SHA-1: 7264d0ec2a1c7fabbc6c27b40b30ecbc5878b231 SHA-256: 3e20b591093c8a5fab94a7031ff603a2d56ae0ca698ebb577b177636834600ee
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware distribution intent. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8295

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laborke.ru/uplcv?utm_term=rounding+off+numbers+worksheets+grade+7 PDF link annotation
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608703a88c0cd---refudamevifano.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160d07e6915f73---vibolafajosime.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16131fa03dc656---zuxajikijumunovapize.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/fatufubopakerav.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/msbg709p102gbafsvjq5on5390/97581344006.pdfIn PDF document text
    • https://bocrangsuthammy.vn/upload/files/43359059988.pdfIn PDF document text
    • http://abc-tel.ru/data/File/nagulegaribe.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/mq5s5unc737lradtgquiarf94i/dudezezi.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/83645966438.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608878cb3c6f2---zijapur.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/82691417518.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/jikumiter.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/tufuj.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c89e54985---wimipekagaboxatowo.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/25058453165.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/vp8qjrrg9skk326sf5tg9ff747/mijinubatogigiro.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/baritubeponadaxu.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/paxekuvinefinukiwavek.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/jafepukaxilam.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/3ed247367f97f8a48744810c638b3935/7263864264.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/favabizarugovibusigenola.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/bomivakujipovoket.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/45748807083.pdfIn PDF document text
    • 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_off0000d4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC4 11268 bytes
SHA-256: 4c43532003a5ad67a7cf4fe402cc92df11eb94774ca78aa30f6c5f7c94cec9ca

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