Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7df07b5260c03ed…

MALICIOUS

PDF

51.1 KB Created: 2021-06-30 05:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 453a2a3b78240349f6b8fb24d7678306 SHA-1: 7173cfb7eb7e3b1fd26975ead2e332c0e52bc08f SHA-256: d7df07b5260c03eda2340fd107fcb366e8fe9a007a8fedf113ccd6b2afd821b0
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6164

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://pistant.ru/uplcv?utm_term=permutations+and+combinations+solutions+class+11 PDF link annotation
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079491b4d3a7---zejisoba.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/huaqfdq0ide9ntavqjnt57vh8f/likerebemegifozuledo.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/6ce8223um0rb57jb81cm42fnq6/15643153483.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f6bb03899---28771226813.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/0q3s016p0sg5mfpi59rqoa2mmf/65206596959.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/ufmsmg5klhjqspnmr0de7hbbbr/xubuwezoj.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609860002e166---41969798276.pdfIn PDF document text
    • https://thaihoanghung.com/upload/files/51966107385.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/38724105038.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b85df2b5453---95458299867.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/7322d27084509039a34ccfad0dde76d5/vidorekudolepuwuvugu.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/56964680082.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/legikomusufos.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/lodisaxulosiwano.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ad0855679---vapotusukab.pdfIn PDF document text
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/82149018054.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/tolipuzuletebagokunog.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/9c9612581efe179a64013195f8bbdaa2/sesopexudoviferijisar.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/xumexigixixir.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/31567413496.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6d47923e4---14300186512.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/20197114378.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733242ac985---94203770457.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/badak.pdfIn PDF document text

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