Malicious PDF — malware analysis report

Static analysis result for SHA-256 6398acd7a023a42a…

MALICIOUS

PDF

73.4 KB Created: 2021-09-06 12:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ac78b51bb6d6730db134b48dff41a610 SHA-1: deebb3847a16b99a66560902a7a65b939ad13b8e SHA-256: 6398acd7a023a42a78d7659602e15970b3db4c0ab13df1ae1d499b0a39f7c91f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate this PDF is likely part of a link farm designed to manipulate search engine rankings or distribute malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5948

Heuristics 4

  • 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 http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b343dead6b6---bigax.pdf In PDF document text
    • http://ratchadatitan.com/UserFiles/File/36965984248.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/8hhnt0sb40u6htf2lke74hjso9/31743033846.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b136212741---53217222387.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/03c6c2a0c7170b81c02acab3cadfaaae/33453208622.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/22085885146.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210620_224DD93E65DA4A9C.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078eeed3f617---murikowodavowerom.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/vefifuwikokobegozibofeg.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/zimateterofosesonatumilog.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/rkrc721ic2p6l5te1vdmvvmvq6/liboko.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/samutimoxewamanufawo.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/25032233188.pdfIn PDF document text
    • https://retta-bg.com/userfiles/52228273111.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/44147527492.pdfIn PDF document text
    • http://ladna.pl/user_images/file/nezonesemawupes.pdfIn PDF document text
    • http://honda-vo.com/upload/file/43826409319.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/6744165346.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/a6methalqq9m0j14om9d408p8i/5708316106.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/48d2a096d6dcb1bdc451a282f041c76e/gedarunuzojesudiwobusaf.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/kokazef.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d72b43849---41741459614.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/90474858176.pdfIn PDF document text
    • http://cityfate.com/files/files/soxozajeraw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=cuidados+de+enfermeria+en+oxigenoterapia+pediatrica+pdfPDF link annotation

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