Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1fc42165ff2a185…

MALICIOUS

PDF

101.3 KB Created: 2021-07-17 14:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eedd15ab23454fe6754d01970a179afa SHA-1: ffc3caeac9b6171ac41fc79b3a4a0fcf390d33f7 SHA-256: b1fc42165ff2a1850dbdba439a6d56338d9b2f108c6f392fd55312980be07ee5
124 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4891

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://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b437cd7b2---21071003142.pdf In PDF document text
    • http://campingwithconvenience.com/files/files/32521359492.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/nomiwegu.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/iq83cqlr452eovkkknhpm90uui/96422678380.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/413cbb0d85130aa4f7e1039b3abab580/81358346017.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/gsosfcu4spdanr8vslcm2r4832/lemariganakuva.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/90231426576.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/21304080048.pdfIn PDF document text
    • http://gibson100.com/clients/870224/File/47728698017.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/24232093339.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8e727f912---rafogogipo.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/uzedaxepewoxut.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/gakakeruraze.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/suduwawopi.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/gc3u4ukrnv1vi20va1qp3knpj1/72577800681.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/17727514050.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/527b72803adb5f1a7e4f6cce3711ca10/61572943907.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/wanexigoze.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210701_34ED617EFC13412C.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/20819677305.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/832ec8aa7f0cccad5489fc60ee7e353f/lozizawexejobatewef.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/wamatokefuwipokaz.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ikqlqhjvvnkevg608ef3vl80ev/kiremaxaxorovedudumoseze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=personality+development+assignment+pdfPDF link annotation

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