Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6daee1034f096e…

MALICIOUS

PDF

70.3 KB Created: 2021-10-03 08:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 34d14c5c189ab83f3c7477e47ba3c2e1 SHA-1: 6b49ceabeda002db03acbc820552ccc323f95817 SHA-256: 7f6daee1034f096e597300ec57166cdbe9ffa03f063fe68e6f7f803c4bfbb83a
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.nissan-utilitaires-melun.fr/ckfinder/userfiles/files/10247316212.pdf In PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/zokizasolugifividerizene.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/e2608d979cef4e78413ad68ffbcce95d/45554488785.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/pasaxugagarebumolitapulog.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134808edfe88---kukogituresegatezijag.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/11563927842.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/wubosuxaterigidovomojefax.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e7b93ac1f---37010822290.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/8b85a04805625a339f09b6fe968a2d31/waroxonomukevanus.pdfIn PDF document text
    • https://datajournonepal.org/files/kubetizesap.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/aaa41bf06e11140fec586168147db33e/repujip.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/39735737684.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/kegipomiseluxanafulizo.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/17726801015.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613879ce30a3a---59440657138.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/mujibibonugos.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/movitupaseto.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/xafoxorud.pdfIn PDF document text
    • http://xsjsbzrw.com/uploads/files/biximawodatizaja.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/dowamuzekupogofegevi.pdfIn PDF document text
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/42459455447.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/58345975765.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/kewuluxarilulemile.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/3934025502.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=destiny+love+quotes+for+himPDF 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_off0000b3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCD 10744 bytes
SHA-256: 64bf57d7c6cfff5fda98bbb676da1165ae48b631e7421c9882279b3d07d37476
font_02_sfnt_off0000e45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45E 15424 bytes
SHA-256: 96d48b89548915b47f3ff5395bf160e1d757d67ee6abcf55a1ef64ebb152782f