Malicious PDF — malware analysis report

Static analysis result for SHA-256 66242bbfb8cbef9b…

MALICIOUS

PDF

58.4 KB Created: 2021-07-25 09:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ed8751f973a37349e1c33549863355e2 SHA-1: 6b9dcf9410994774c2e9463c71c97eb73c454689 SHA-256: 66242bbfb8cbef9b4091997bbc1d81e42a854f7c76a49cd5b44abb88db535e42
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as a PDF phishing trojan by ClamAV. It contains multiple links, several of which point to compromised WordPress sites hosting PDF files. The presence of external URIs and a link farm suggests an attempt to direct users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4535

Heuristics 4

  • 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.
  • 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://vogiantinhmach.com/media/ftp/file/tikixafab.pdf In PDF document text
    • http://mistralizmiryonetim.com/uploads/file/kedamanoxoxudij.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/ltudg68eqvrolmn2bkv0c6mrgj/21247099352.pdfIn PDF document text
    • https://srilangkapools.com/contents//files/51730258404.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728ee542b53---56742406482.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160981dfd6920a---soximekijebagiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=interview+question+what+are+your+strengths+and+weaknesses+best+answerPDF link annotation

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