Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b886e56706e3f05…

MALICIOUS

PDF

102.7 KB Created: 2021-08-03 10:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 74e363492f210acc8694f0493861f7a8 SHA-1: e7bf191b56c4eaae3576a36d501ff48e7d6643f0 SHA-256: 2b886e56706e3f05a489dcd6af1a0eeda26b0ef9eeb11f3bb6ba8b54e6025b8a
154 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which are hosted on WordPress installations using the Formcraft plugin. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to download further malware or engage in phishing. The presence of multiple distinct hosts and a link farm structure suggests a broad phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9421

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://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3779874a30---19526774289.pdf In PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c22720fd38---sukuxisej.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbfb97af9f---vodexelapunevanafuviw.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/67252914946.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16c4b94c93---77537501890.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/12485058561.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e082a1647---34053511948.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/newinigemosubaki.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a11871c41b4---sivuzufa.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/a7282fcff33f5200b337701c871b970c/xuwezuduneme.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16077c635870b3---vavilu.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/gekiju.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/wukilizozuxuko.pdfIn PDF document text
    • http://mrhobbscoffee.com/images/uploads/file/bakorawebuwegogerevo.pdfIn PDF document text
    • http://fitviewer.biz/files/file/xufinidugezazis.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160fafb7cc622b---47760294358.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/jebejep.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/955636385.pdfIn PDF document text
    • https://slide-bearing.com/d/files/jexaraziromig.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/23562877938.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ecd38c97d1a---guvaxomama.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/kobiwefajoramoziwutulim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=would+you+rather+questions+dirty+redditPDF link annotation

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