Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39ec12c697ac604…

MALICIOUS

PDF

54.3 KB Created: 2021-07-30 01:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f6cfa0077111e80ee0a5bad9a9dc8a9b SHA-1: e5fcd6813038783a30bbd6864021e6781525e5db SHA-256: d39ec12c697ac6046987ecb38f4a69cca0fa05ac00d4f4d3c6d054c19bb6be69
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm with numerous URLs pointing to potentially compromised WordPress upload directories and disposable hosting, suggesting an attempt to distribute phishing content or malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9030

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://inwebjor.ru/uplcv?utm_term=sinhala+love+story+books+pdf+free+download PDF link annotation
    • https://fwullong.com/upfiles/editor/files/16978560486.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160986f96c007c---17746840038.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e040a03c2c---7412697447.pdfIn PDF document text
    • http://accronline.com/userfiles/file/38612766438.pdfIn PDF document text
    • https://bataretak.com/img/files/file/48830308424.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/tasuxa.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6b2fee56e---1199268041.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9b9855405---bobarolijexofepidavep.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/86584872561.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081c60cdc560---sezomelerefubetatotodo.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8be7ebdf9---681120331.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/38d7ae3dc8215da30348cabb03c39d46/12341863391.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4072b8f77---nofotabimobetogitebux.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e653acff6---45929345193.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c106446ca26---45614271187.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210609_A0176A191037978D.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/10598580634.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/2fcccaa91d717551fdbbec0d67207514/xiwusanajevanakagex.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/v1gp4f1jdro5qcqurvlv6nv7q4/61998896549.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/f5300459cecc2df5fed6892f5c944e40/66237657176.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160ce53773a843---vigab.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/jg8apllbg0omrmnifpuuvtba52/21410716687.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/41370259024.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/sepegu.pdfIn PDF document text

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