Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf978ca73853ab24…

MALICIOUS

PDF

48.4 KB Created: 2021-06-28 02:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0412f175f08380664aa83c1097b3499e SHA-1: 4443261419475b90f5ec70730f62e5fdbd97c6cf SHA-256: cf978ca73853ab24a3ddef60229da33cebdd7f0dbd51f1a1cd55239f6df695ff
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple links on disposable hosting and the use of 'utm_term' parameters suggest a coordinated effort to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8987

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://archism.ru/uplcv?utm_term=for+making+me+believe+that+you+could+be+faithful PDF link annotation
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d34d7e42b---xujutavapajam.pdfIn PDF document text
    • http://dongphuctqueen.com/upload/files/sozozeb.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/lapalatedewubuwaxivufaj.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/8c9581bee51dfb9ccccc52444c04bdce/61674920646.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/tipujibemotegemekegowaked.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/kuxufesiketoloxesineted.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/ritisaxevusavabowotexivi.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/39298992334.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/34602982892.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/3e2c19b54c264fe8bacac22a5ecd39d6/vozikilapovofipuliz.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/q2iup80nvvdb2jjq8rji0g3hi4/32870551457.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/dupipejabopesifanamubama.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/4c7056bdbc7ffb9aac2763c256b5ee39/59232748555.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/qp9siturcb2799ijp62esm6sss/nalazeb.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/f3o6tkjnf3ov9824ipmgp7lhf2/20808752516.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/qt3c7or8b7f3vsfeqrg6m4g1t1/1019832969.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/vefobabijegegufefi.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/gorifulononitujavo.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/u09revp13cca0839cscmvntiv5/kaguvadesarure.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/052949a1a48ac48f735f2f7d0b0608a4/81030063290.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/liretidafewilijinujujijof.pdfIn PDF document text
    • https://bluetact.com/ckfinder/userfiles/files/roxamijekofofolazok.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608077cf59270---sanotazezebapukafirewub.pdfIn PDF document text

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