Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c655e85f578c810…

MALICIOUS

PDF

70.9 KB Created: 2021-09-18 22:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ec20d047076adbe003c43e16285ad901 SHA-1: 9ca83e4c5e449ff6b78f90b77da4dd0c81e4f338 SHA-256: 2c655e85f578c8100ddea27953503bfcc76007c48be9d41560c8e75227c29555
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malware or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, and the document body was unreadable, but the link farm structure is a clear indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5948

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://drafthe.ru/uplcv?utm_term=cracked+apk+sites+2020 PDF link annotation
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c16d66b5c---81764101694.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/61923823093.pdfIn PDF document text
    • http://phamtrangia.site/upload/files/xozofomibujaz.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/34317126725.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/44036502357.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/48612468077.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/kopokidetefirikajusizupip.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/bomin.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents/files/tibizibenerotuxawi.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/xabolamo.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f58159bfa1---44480776121.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/d4rcsft3vdouur6bqsvqkmbs92/6448798031.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/turevelibomurupakadunim.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16131fa32060bc---55593038207.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/dudisagezemokadogudada.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/kowavorumemipezifuza.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/5e96cc2d0713f390008e3b79b015fd8c/fuzupe.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/33096241278.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/11496417713.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1a2690005---maxowexowesejiletofurem.pdfIn PDF document text
    • http://landia-print.com/pdir/file/15517958962.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/repederopajob.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/vg9p766k8gb2vbvlo85dsgblem/fokejul.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132ff276836d---9739984012.pdfIn PDF document text

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