Malicious PDF — malware analysis report

Static analysis result for SHA-256 2745c86f8dc59748…

MALICIOUS

PDF

84.4 KB Created: 2021-09-02 13:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 46d2a0f25c2ac44fcf36f22f13b8ef9d SHA-1: da27d270f436072692d68b175f9dcf57f5d0ec4e SHA-256: 2745c86f8dc5974860f4d2bdcc4207e92d998fb36293a43c716af01b46ed8c87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URIs and the overall structure indicate an attempt to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://herium.net/FileData/ckfinder/files/20210805_F89CA7469D60B537.pdf In PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/refimekibidusiwuxido.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160acf0d20c3a4---topiwodarezopi.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2430d41fd---ximomazumozimixovomigon.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/gizaxolunapovaxigo.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/08/11/dofezutegofabedipifi.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/xuwukoxuv.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/koburof.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/tblbpvjgu3g1mlqshmugp0bgd1/15734118740.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608483a20ac26---88459171106.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/guvefozaf.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/xekizavire.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210823_90FE913FA788FC9C.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723943ebb7a---2621420221.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/dedasopadelebedotaxiroxib.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160937df6de5d5---29028758586.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e59a48fde---sorerigid.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071224ab6638---87245291698.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/botulefovitivividevavoxij.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38f0056b83---kopobosojilusenasogofuf.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/74996019047.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076153fcabb7---xipirazul.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/jixaj.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fb11953b4---lepored.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/dubakitike.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=propagation+of+radio+waves+dolukhanov+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00F 18896 bytes
SHA-256: 33a43410d01c7953f2a6b36615a8790bc3d9188b7b421f1ac07bbbc1264cc47a
font_01_sfnt_off000111fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FB 11120 bytes
SHA-256: da40732ec796f21c60a6a041aacee6ea63dfc1ae84b341d4bfab9f091d97e1e5
font_02_sfnt_off00012bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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