Malicious PDF — malware analysis report

Static analysis result for SHA-256 a843299dbb4bbab5…

MALICIOUS

PDF

47.6 KB Created: 2021-09-02 15:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f83c6f78a1a5cc030f593cad2c2d5f72 SHA-1: 5caed8a222ce928cc2de6397ef5873d45d24ee4e SHA-256: a843299dbb4bbab5b7f334fa85c03f1d5610fd05899d21821d5bcff109f22b7a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5469

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://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e178a4d62fc---89105539547.pdf In PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/dazatow.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/kovanefomawo.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/kolidusor.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760e4d0849b---livowivurixopur.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877ae753ed1---99145548485.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160883fa17af76---47525974006.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ab298e75fd5---44718738398.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/joronokiwidemivexigumozo.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcda589ab1---lunug.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0325e23e1---regami.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/80886602582.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b04f12cd1b9---laxudalijuzetuvof.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/kididizi.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/17495349802.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/53291854130.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/44449065574.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/36713594303.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/8fa396370a753246fb079aefac106f98/30562039462.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2c66d4b71---33797070040.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5c07c0ce58aa57bce54aed4998af7d4f/6157811970.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/9767707111.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611dbd9e8fb7a---33146656441.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/60695514869.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/35793581855.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=all+functions+in+c%2B%2B+pdfPDF link annotation

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