Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c0bc78df4018f0…

MALICIOUS

PDF

117.9 KB Created: 2021-07-19 23:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3b0c872de2843b9e300e424187f33e1b SHA-1: d40f55103a61e1a903a268bec16e600b1d3bb54a SHA-256: 31c0bc78df4018f0ea0e1b11736f87297a87ffa9e5095c9c7f436f06aa857c99
94 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous websites, many of which are hosted on compromised or disposable domains. The ML classifier flagged this PDF as malicious, and the presence of multiple links to potentially malicious or SEO-abused sites suggests an attempt to redirect users to harmful content or phishing pages. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5358

Heuristics 4

  • 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://lamgi.pl/ckfinder/userfiles/files/6864353000.pdf In PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acc4d97df0---6368804397.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/47c834eb1e967ee81cf0730a0a9c9bfa/sufogo.pdfIn PDF document text
    • http://takemehometomatoes.com/ckfinder/userfiles/files/3443216000.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6c39e4dde---7770490471.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/10185446227.pdfIn PDF document text
    • https://ancoraeducacion.com/images/72430500952.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/koborodibovugu.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/1819231554.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/89a7f772ab1f498a62854b4fc76fc3c0/18653107099.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/10423593681.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e960b2559aa---14491764982.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/puelmof9u449gevo0qf72oa585/jirewinubasumitoliled.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/nsqblircfmq11qi1nngt8iqcc4/42200087346.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a5ded0c1c754f8e3f0acc39ddcf9ba75/80949508620.pdfIn PDF document text
    • http://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/15117680720.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/a5h0b7336jvak0upj09iomv001/jewuvuxiruxe.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792fac585c0---83654095000.pdfIn PDF document text
    • https://standardpromotion.com/images/upload/userfiles/files/29735264786.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/raa2bd2mvjon0drubt3hp03c35/61944808902.pdfIn PDF document text
    • https://pnlcoach.com/misc2/file/In PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/9bir6hr6c1bn0f7adngqnf3bms/semikaguxozodogunifuvez.pdfIn PDF document text
    • http://curtisfamilyfun.net/clients/e/e0/e02f67ab5b6879a7eb6c21a3163f7106/File/bokudinazul.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/de608dde84cb491ceefd00e9793a16fc/migorubo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=beyblade+burst+all+episodes+in+englishPDF link annotation

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