Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce309cc625b5bbd…

MALICIOUS

PDF

62.3 KB Created: 2021-09-04 04:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e4db40d7fc18623fd802f7f8bfe23335 SHA-1: 79effebab2de967ecb9d809ba0c49fa3014b412b SHA-256: 9ce309cc625b5bbd04104cc5f10ba5c63ef1031cf5c5bfa5ea52deed8ad9f489
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to phishing or malware sites. The presence of these links and the overall structure strongly indicate a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7090

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://coretry.ru/uplcv?utm_term=triplett+model+310+manual PDF link annotation
    • http://topup-fight.com/ckfinder/userfiles/files/79583856175.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/madivozowixizesor.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ec116fc13ee059fd25c945f2af7c02d/lakonamik.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a63a485ad4---kulufimodeserut.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/70417123194.pdfIn PDF document text
    • https://iasvn.org/Images_upload/files/23290705403.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/45978470330.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/45807401438.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/fn9jmlhu2o8ipa8fi4rdcfbu0v/87854454435.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/40b5b6c4b75f18c8f366c6b8529bf8f5/xisawize.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/pfifnas0d4ivhcn4uile9212q6/51484001926.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9b811801c---dawixezimipopakowujot.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5777775185---68170968631.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160986ea97501b---15252956109.pdfIn PDF document text
    • http://xtra360.net/campannas/file/50463594794.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce7cecb774---68146456174.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/51897070813.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/7g8psn52bu5dn6p0vgihmlddqj/joparodopadelikop.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/842fba1905dd7e52be1a0f0f5edfc77e/wexigisur.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610c1110c714e---63794815361.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/nuromukenowuviwi.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///19566031129.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c20412022b---28540262996.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF37 18072 bytes
SHA-256: 20b0f99e412c9b6240f9d85a17c0ca4f4a86ca51883811774fd1b2e95aa787dd

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