Malicious PDF — malware analysis report

Static analysis result for SHA-256 0104ce83650e0467…

MALICIOUS

PDF

47.6 KB Created: 2021-09-06 15:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8c98a4bb4ca5ada1245f1b43f3692847 SHA-1: d9328b78b93d030c5aa652a5998667f588548435 SHA-256: 0104ce83650e04673eeee6aacfe7c4e96bb722d0d56f8e9c1203a305f5d46dc0
174 Risk Score

Malware Insights

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

This PDF is designed as a phishing lure, using a screenshot to obscure a malicious link. The link directs users to a compromised WordPress site hosting another PDF, indicating a multi-stage attack. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to deliver a further payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6676

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 47 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/c4d9667fface7464e592a45dde834b2c/28495986851.pdf In PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160912d34473c7---sijuru.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/98886636771.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4988a6da2---44648410371.pdfIn PDF document text
    • http://checopharma.com/upload/files/18300330817.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/c419690eaff8ca98f89f7e26a73e8f87/jositiwijuru.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/e1add8a354d2c5f10591677736b541c9/2172894509.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094521354a33---62632465474.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/soi8n8f8nn9bq5s8fjp8vpa6me/71861353584.pdfIn PDF document text
    • http://biosite.ru/images/news/file/kilin.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/47685602599.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff19d9625d---fomezepe.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/nodatoma.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/945b82609a86377d8a6130bce85b4e25/zuwinow.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/vufafud.pdfIn PDF document text
    • http://fpempresa.cen.es/userfiles/files/suzazowaxawilajowukuv.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607a33346af1d---24874669750.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160fb561fbae60---xuzenasadijax.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/42923804444.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/zejusupo.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/e8b8c7c10105e63433c7c6465ffc3b90/29780113127.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/rpbk9rijj5oop89oaurb0ph7s5/jovakox.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/rt6ii4655pajbsio4slo1hpv42/mewusebuji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=clock+hands+printable+worksheetsPDF link annotation