Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d1b56cbf91c177…

MALICIOUS

PDF

47.6 KB Created: 2021-07-18 03:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c1c0b118509b9fa14c42ddfbb54b1278 SHA-1: a3d8757dcc84ddf5946c15e1d866d8ffcc096b76 SHA-256: b8d1b56cbf91c177e2601514daa4a47f7188ed168d07d951a23f8892e202883c
154 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. The PDF likely serves as a lure to direct users to malicious sites, potentially for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/a6aabe9867b426c462d5def95a15e429/tunolerubeluzamejizaselu.pdf In PDF document text
    • https://rajatotogroup1.com/contents//files/73772676040.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/vewudigebuxulo.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/73380516523.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160d6c10d06a83---vipobixejabavularil.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160803260cd79d---11723834208.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/71776381430.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/jdpog2ktigjghfjv0mtj5het8h/57830396365.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/50f80e95cf68a7ad3864f504224fdc9b/38747219601.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b3645c5f66d---20746102830.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748d09c8935---kafajadesibunovakerur.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d04f66876c---2697358160.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16091f9a4a43f3---robimibok.pdfIn PDF document text
    • http://minhvuongthuphap.com/upload/ck/files/46713306825.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df30f3493c---belipifuzidilagog.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a931f5126b7---wuforodex.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160717c0e20b34---pagatavejud.pdfIn PDF document text
    • https://orrizon.ru/images/file/lonaruzizoludafijebovipar.pdfIn PDF document text
    • http://chapmanhighschoolclassof1968.com/clients/c/cb/cb1fed5110c07f199f416a264ee6943c/File/xujotelod.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c12fab5430---59000542216.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/i9r7r7uf20qpcdnpgv2hb3bdmo/xilusalonat.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/14880298783.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/20453414390.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/29360372330.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/47760155877.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=windsucking+in+horses+causesPDF link annotation

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