Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7eddf1233f3d08…

MALICIOUS

PDF

54.4 KB Created: 2021-07-23 07:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 436fab2b9acff80f92cdbcd84265eaa9 SHA-1: b99e14b93d130a52c8449ad28432fd032116c349 SHA-256: 7b7eddf1233f3d08f5a04cd715cb2194995db3b499d58a51e0172814e3e2735c
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with multiple embedded URLs pointing to compromised WordPress sites and disposable domains. These links are likely intended to lure users into clicking on malicious content, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4989

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.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094223bdf091---sezimafufefigikoda.pdf In PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb40b8e868---kuvupegako.pdfIn PDF document text
    • http://519pf.com/userfiles/files/8378333432.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/5fu61tsd98m9teoj6lu28351ch/22146897903.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a516ab4b355---vejifurotabo.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/vopobuvexef.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b315d8da619---wixoduzulivefosug.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/f9866f462b28982c4a5d7c5f33cb2db9/rodeni.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d4b005cee---93893362582.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/malub.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/62684804178.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+double+space+on+ipadPDF link annotation

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