Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce5361d90288037…

MALICIOUS

PDF

77.5 KB Created: 2021-06-28 00:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 403a651010e3fea1086f9a97fdbf08dc SHA-1: 49b44d952cf0a4c45a3ed1e185d0ab21567f4e2e SHA-256: 3ce5361d9028803705ad44d95c193d71bc69118b46153ab9f67b84a85e6f76c1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file acts as a link farm, likely to distribute further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2855

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://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/faea64d4dee3ee3f6bcf496f50d71bb6/61157602019.pdf In PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/a1e134ae94d00a6096a3640c26459d41/pixawufabe.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/kokepar.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607951d14b174---tatuwoweverafipitevefoj.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/penogo.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d71723b4c---tejabesuroguwe.pdfIn PDF document text
    • http://summithighschool1958.com/clients/71652/File/4212262441.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/d8b702420b14d513d50ccc9b0215e5a9/rovabuvaguwebuguxa.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/2021621644432582.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/fnckfedo7eoddk093menqnuhe7/jikenosuluvesisovakoxura.pdfIn PDF document text
    • http://mobilenmr.com/files/files/50270105167.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/netox.pdfIn PDF document text
    • https://papiratisk.cz/soubory/69913380458.pdfIn PDF document text
    • https://paperland.bg/uploads/file/doduxidekuxisirilel.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0fa24680e---54441127949.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/xetimirizavopafu.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/e8c587f4fa7b8e78fd72156094ff55b9/kitamurorewetekipobonu.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbf9013b22---91530141279.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5b77a1faa---fimizadopujajanivitifo.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/0ea0pukrom8q7onnhu6bj3lftr/29705806544.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/fdb48f7f5d6722bd55f647d57a234cbf/728668963.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d02fee606---21450683135.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/6de3a045af1645572b8a2b07fa22834e/91773092433.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608134e8bbed6---8413450101.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b64b85099---bapabekufodipek.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/97059565967.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/fd7cb204b04851349bbbd56e508874a9/xivovexazujukuxigaruvuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=hardness+scale+mineralogist+crosswordPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB8 17528 bytes
SHA-256: fb8fcee07a83275dbc6f1684a6113c74e8bd44fa24dcfe7b236b6e0136f5caf7
font_01_sfnt_off00011bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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