Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f8dde0d91e1122…

MALICIOUS

PDF

47.7 KB Created: 2021-09-04 16:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 57fba81f2abcdfcd456e56b59fbebab2 SHA-1: 7bef90e20ada955b7bb71d191b1410a0e6918323 SHA-256: 57f8dde0d91e1122af28d365298931a30ba8a724552b04ee4fff90dfdbf0d1f1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of links, many of which point to websites hosted on compromised CMS platforms. Heuristics indicate this is a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6441

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://chinajnbt.com/images/upload/File/92830100577.pdf In PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f7a377952---pisosazetigudumiva.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a523d1d94a---79425960660.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/4c89b5a7f40c5a7d3e943ad8c3c42c9c/46733002877.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5137ca483f---najelenumorekemosipi.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/9d8cbdc308ee0042f704ddfc610aa09b/rodepevofalofajusaxoz.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/55449444682.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/eq7r9ebgbh5m6lqfvfejq0olhp/95917378270.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/jofovedimobim.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c449e8d906a---witamoloji.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/2b74e49b298af164b5ca1d800ebdab30/sijevosamesafosiduwu.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160e3fbc91fef6---13551799615.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/ae534a0ab021d72924efaa6f988974cd/varazenemexorevo.pdfIn PDF document text
    • http://www.centralperdana.com/file/57013459642.pdfIn PDF document text
    • http://www.poliklinika-hb.cz/userfiles/file/reselepoviwetifexowe.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/8a6c043cb47b1aaa2a1f1f1362e810ad/mevuzofuvatuvil.pdfIn PDF document text
    • https://altbuket.ru/files/77932298729.pdfIn PDF document text
    • https://coluer.ir/documents/file/8582505340.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/xateg.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210703025551.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160f423f4b40ef---dojagasusidavilimasilil.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/64b89b095d3871d2dbe3ecac07a74867/nevujobewavatopiragow.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080a3a91333d---64619586713.pdfIn PDF document text
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/repirefoxufamej.pdfIn PDF document text
    • https://spitalmoldovanoua.ro/ckfinder/userfiles/files/fibukanibotixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=behavioral+analysis+books+pdfPDF link annotation

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