Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d53e567d56c5ca…

MALICIOUS

PDF

76.2 KB Created: 2021-07-19 04:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 649f84347aec96fa1eb8e8d41a05292b SHA-1: 8c90488cf8492a5e5d9ef1fd1a07244cdac3ae10 SHA-256: 64d53e567d56c5ca40bb29c316b7c13f291f2946e110f8b8c92e417c09de1c14
124 Risk Score

Malware Insights

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

This PDF file contains a link farm pointing to numerous compromised WordPress upload directories. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The file's structure and the presence of many external links indicate it is designed to lure users to potentially malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e19f2ef90f---52155698441.pdf In PDF document text
    • http://trustarshida.co/cache/fck_files/file/nerawuxobexe.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2386e3a468---76791025773.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16077342c17713---pujebebobetowemewapo.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d63c306b130---96312945407.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/pipotevaratilururatati.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2abc37c976---87101289285.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca58b32ad8---27275361910.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffca4b60d1---zegaxixiteruj.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/q550pu7knj2gqvsq69qpfcei7p/zujumafenifazaniweniw.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/5132935303.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160f1f46ccb584---87739701035.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/092ad6763fb1740ab4bf53e06058fb8a/19326481121.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/lisanigenufumezamevumijew.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/dodizasaginerumosefuraf.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/medexerejalijobuvekajo.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/6796d63e8429beb5e3b502a7f1f9780e/63670102881.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/wiwurerolapinezupepube.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/g9li3uq929ufac1rlodo11fvvu/56666185540.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/puravokuzeguzefufakugu.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/19469270352.pdfIn PDF document text
    • http://stlukesmn.org/clients/17773/File/49094253651.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f56aa58deb---pezamimekaxomutedi.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16097bb0f92937---27869303299.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/c0d211f013109e47562a1562aa846ecc/mimogonuluzegebajewedona.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=failure+mode+and+effects+analysisPDF 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_off0000e87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87C 10828 bytes
SHA-256: 3b134fbbe0b3804468ac75463f97acde147d3140986d6a0ca5231831ceda790b
font_01_sfnt_off00010178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10178 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1