Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec87ba9c19d84df8…

MALICIOUS

PDF

54.7 KB Created: 2021-08-10 03:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0e0820d8987f95340efb18e3dccea5fa SHA-1: 54c223b6425c1f1ca6bcff188e3d30c6e5b5e0a6 SHA-256: ec87ba9c19d84df8bf9d7a7b32b6804737a4746d94bd895e3cf8c9d63cf54781
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. The presence of numerous links on potentially compromised WordPress sites indicates a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/489ad19c6c0b5c15e615884242e750b5/49105411775.pdf In PDF document text
    • https://mariellatriolo.it/public/file/96384484028.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/jupozulezipuwuwulifotazu.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/pomuka.pdfIn PDF document text
    • http://soflacops.com/clients/83266/File/32888251419.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/1ebe0e121bd591145a839dce6bf7f2ad/xitisubexajan.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/1aace55a4fa350aefcd880e139f0ac89/62551242289.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b37747313ed---tugixo.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a56300755de---49989881197.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cabdf0646f6---wawoxaverafodabisisebig.pdfIn PDF document text
    • http://allycatering.com/userfiles/57813269025.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc4f8fdd21c---15753204368.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae03001e7bd---46527362887.pdfIn PDF document text
    • http://songiadahoaian.com/upload/ck/files/sawaxuxugidawinibu.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608024ba16a9b---65850274173.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/nebisawaxevujogebevexite.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0f9e49ffa---bavijigok.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160c6831424075---togigumuwegewemitamizik.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/4298762426.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/15476567885.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/85488246678.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=batman+arkham+knight+apk+obb+modPDF link annotation

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