Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c488624850ced8…

MALICIOUS

PDF

43.8 KB Created: 2021-09-15 12:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9f9537ecce1da81c25d9d5300a0ba2f5 SHA-1: f299a77bafba771ea086406181a5470be14c2c6d SHA-256: 45c488624850ced8cf832d90c7767f566d0291f313d579e1f4b8321ed39b5aa6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8070

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://coretry.ru/uplcv?utm_term=move+photos+from+ios+to+android PDF link annotation
    • http://maroba-zirndorf.de/file/zujumikejufunijeduratu.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/punajabodokavoj.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/93513670146.pdfIn PDF document text
    • https://myagenda.myagenda.cz/pictures/editor/files/tipob.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/50375958148.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/fuzetibegarunafiludobufu.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/50550690006.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/8foj5vravvh2chdmvlcs9lnr12/dufamepenaxorom.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/43880358174.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161326685dfd94---3044031256.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/runusedujolinomadijele.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec7063cb15---sipusimofu.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141379d7e3d6---vuxafakegozivopowepebapi.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/32934607762.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/82550202763.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/pomaxemoretubejuweri.pdfIn PDF document text
    • https://yodobashi-church.com/54083967599.pdfIn PDF document text
    • https://maturana.cl/upload/file/4168938677.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210909082707.pdfIn PDF document text
    • http://aotwcasino.com/ckfinder/userfiles/files/toropizifefedoba.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/vunabibemorofopa.pdfIn PDF document text

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