Malicious PDF — malware analysis report

Static analysis result for SHA-256 d122aeaa1c7003eb…

MALICIOUS

PDF

58.4 KB Created: 2021-08-18 15:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d0d140506b8b42083aa1f16bc4b406f3 SHA-1: 07225c0c2f902b56d195bd5dc843edcebad05340 SHA-256: d122aeaa1c7003eb1f3faa2223ebab3ebba96fce2b93d733e0074e83cefddd0b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and heuristic firings point towards a malicious document designed to lead users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7683

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://esipro.lu/userfiles/file/36429913590.pdf In PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/slrko5i7o8luie984t2cardsko/1762490083.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161130fa965699---nisowenepizupipedaw.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607992c8afd70---vujij.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf9449916f---6169117671.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1731d4efa---12826796161.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/38568367085.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/sikavokatez.pdfIn PDF document text
    • http://library.nesdb.go.th/ic/admin/ckfinder/userfiles/files/nifibu.pdfIn PDF document text
    • http://madison62alumni.com/clients/e/e8/e84cd6a5166dbe8c5f6852bff763f4b2/File/sulanononevosov.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c753bc45a3---23147296072.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/87197918517.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/zapowimifojufuvirimol.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/68686726.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/96335944224.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/76132556610.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/78393160156.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/89444241097.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=electronic+battleship+instructions+1977PDF link annotation

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