Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5053eaad802525…

MALICIOUS

PDF

63.6 KB Created: 2021-06-21 02:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 35ea9492f8f0c18e1f39ffa0168628af SHA-1: 0d7116374d55010875f076571b8d35bcf97aaddb SHA-256: fd5053eaad8025257cab9c0cf795595cf0a9ecbceb983a5bfca6d3c6e31f0435
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9668

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 http://haiphongcontest.com/images/files/vopafigimajexekapawujura.pdf In PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/90ebc5bfa2be3604d82e57d85fd049ee/roronejibonotesoxoxuti.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/2a85f25ecafec26ff7b53e8bc7d0ee1c/tifitoloduzom.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/girurepefenax.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/jexawiwolipa.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/jexubetowedenipug.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc8384cb03---sodugigewixurafibiluda.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16079f4e1bc4fc---nizitibupigagegesi.pdfIn PDF document text
    • http://northcity.rs/slike/files/nulodus.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210528001455.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/boxurejorese.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8de550bd2---9139545087.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/watigilorera.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca69d5a486---menudozomixesedofiw.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/vobufuve.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/36049989064.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607816729e892---63586202325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=accounting+exercises+with+answers+pdfPDF link annotation

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