Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe185fff0975db30…

MALICIOUS

PDF

37.2 KB Created: 2021-06-26 14:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d18e781e17e75dd00f21803760c9f6ec SHA-1: 69bd0261f9d801becb9cdee4f4a18a5fa82bd424 SHA-256: fe185fff0975db30f5561070f5830cb9805800aa0611306fef4c222c3aff74ba
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to hide clickable links. Multiple heuristics indicate the presence of external links, with several pointing to compromised WordPress upload directories. ClamAV detection and ML classification further support its malicious nature, likely serving as a delivery mechanism for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6667

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 37 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.
  • 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://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160983bbd78a63---ledowafejiravuruxa.pdf In PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210507130741.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/23666157924.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/zipeg.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843d79a84b3---sagilopusetixemu.pdfIn PDF document text
    • https://banghenails.com/upload/file/xipifatogawazexedu.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/75582259627.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/024b1e41d57ba75e2e2d404f8230d293/kuzasusedorikiroxowolug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=find+jobs+inPDF link annotation

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