Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75e5e80da494f8c…

MALICIOUS

PDF

69.3 KB Created: 2021-08-09 06:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 72ee8cdcd959426f59985aa568666f98 SHA-1: b88e684e4f1b80e1294462c7cd47f8db8fdba972 SHA-256: b75e5e80da494f8c889f2768cd47a3f51230e621d0262c43476bf204e3be8d38
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a pattern of link farming. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8414

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 http://huh.hu/UserFiles/File/sutikeragepivovanasipufo.pdf In PDF document text
    • http://the-bom.kr/upfile/files/gebuvidopizasufa.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af644d9a1c4---71945139262.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/jojaximuvavuxidak.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-7/20210607072853430520.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/lemedudofedazelepenep.pdfIn PDF document text
    • http://suacuacuonthanhhoa.com/upload/files/pulejeperezufuxinaju.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a877c67dc7c---kobewodasuxe.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c35774246cc---10173351148.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/02f91431480add583ec972497c32c65b/diwujituset.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/51b968c7a5328d7334470b5ddf14ea20/1349264245.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/96029061054.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/3ce66mf5vh7i1u1md8rntno4k5/34303082223.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b1b38b217---6849931087.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/md95ak9ijrvnuqfk2q4tp35tsb/melewalediloniva.pdfIn PDF document text
    • https://strechybenesov.cz/content/wikefawirudidusuvelopibum.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/67058390072.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/wizut.pdfIn PDF document text
    • http://mardeestilos.es/fotos/file/nesomu.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/23637905507.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2819546ba---vegilonetesiso.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dd9d3eb69---kijovifafosik.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cca9cf43767---nuraponufopufibedupof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+fold+a+top+paw+dog+cratePDF link annotation
    • 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_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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