Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9372e95fe638a8…

MALICIOUS

PDF

58.1 KB Created: 2021-09-18 20:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ae91f5e5df1fec7340c3139a2a348dbc SHA-1: c3e35ce6ccab2cce361b2f1519472e31288429b5 SHA-256: fc9372e95fe638a807061742d29508d787c00740fee572ff2296ba9073d9acae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host a large number of links, likely to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6261

Heuristics 5

  • 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
  • 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://allytemp.ru/uplcv?utm_term=how+to+hide+videos+in+android+without+app PDF link annotation
    • http://azbuka-d.ru/ckfinder/userfiles/files/jiruwesojoxuvunakititav.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/xepufixunadojotosadi.pdfIn PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/20351892769.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/12918400681.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/14c070d5dd12da58aadeafd63be4b49d/58269984159.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d1887a7b3---fezejowuferofajezi.pdfIn PDF document text
    • http://quartierdete.fr/uploads/fckeditor/file/zatemakaperurutomixeriz.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/babetibagidiwetubu.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/1980106030.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/10516355601.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/j8jcedh6oo7tfldi8eposb5ab7/39721828834.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/nisaxaxav.pdfIn PDF document text
    • http://ortopediaszombathely.hu/editor_up/96095083855.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/bukevaxil.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/537221625.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/61011063109.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109021052142736.pdfIn PDF document text
    • http://hacsbathtarntaran.org/~/userfiles/file/18876252351.pdfIn PDF document text
    • https://magnanelli.com/userfiles/file/89840700224.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c37f8c32e---35384689279.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/23698945865.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/61272218310.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/ddecffb60165001c80ff0620bb8e9496/60683659457.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/62099915035.pdfIn PDF document text
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/xajab.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f74a76b42d---23998195442.pdfIn PDF document text
    • https://adikmanis.com/contents/files/wodoxotonox.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/letikibebisosujavasanar.pdfIn PDF document text

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