Malicious PDF — malware analysis report

Static analysis result for SHA-256 540f4351f2b8d18b…

MALICIOUS

PDF

63.7 KB Created: 2021-09-03 16:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d2324e37d2bd697c768a61589b2ce789 SHA-1: 1968e9cef4fcddd42a6acbee36c7d9e73607a743 SHA-256: 540f4351f2b8d18b35f589c9402a6f9a1760dfc2dbdfda398d2128a18e413490
154 Risk Score

Malware Insights

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

This PDF file contains numerous links to compromised WordPress upload directories, suggesting it is part of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or malware distribution. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6403

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://pistant.ru/uplcv?utm_term=2.4.2.1.+do+manual+de+orienta%C3%A7%C3%A3o+do+leiaute+da+efd-contribui%C3%A7%C3%B5es PDF link annotation
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f72e272526---lesezokowujisadaz.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/b6fd94c733897840662036f36dcc1604/zeluzexaxerix.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe297788ab---61338645801.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210813105757.pdfIn PDF document text
    • http://truthtube.com/UserFiles/file/mowujubaf.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/niwebo.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/a18ea30b2478b17b26b57a75ee03cb2b/visujajozatagisa.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/753511ef2d8b268178c6557458fded9a/satizip.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/8014955084.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070023b50ee6---83953435312.pdfIn PDF document text
    • http://yuhao-tech.com/userfiles/file/36740175066.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b3ca9ed0a---balelonowogovovatog.pdfIn PDF document text
    • http://attlas.center/userfiles/file/niziruzaduvubamavu.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/cfd40ff299d50699eb9c60308006387e/59742023665.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c98306a4b48---66578006562.pdfIn PDF document text
    • https://hse.tw/upload/file/tifuduvudonipabur.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09e2b57176---jagadis.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75af05c560---muropalewixodenizapepet.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202108251705464449.pdfIn PDF document text
    • https://bgmediation-flm.com/userfiles/file/wijuwo.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/gobasakulijoronisekotozik.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e7e44c91e---21529397729.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/pisupov.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc566ae6388---ladodumuxofurajudigi.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///vipamiwebatusiwelesufu.pdfIn PDF document text

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