Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9c8612d1a7a2cc…

MALICIOUS

PDF

56.7 KB Created: 2021-09-03 17:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0dfebfe20fccba6e7aef0652d799e7ef SHA-1: 1e8bfc582028328c7b23446ae18dd3720d2a414f SHA-256: cc9c8612d1a7a2ccb7bf5fac5a63f5ddf2500a55871a3c68a857a7d1e87195f5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. These links are likely designed to lure users into clicking, potentially leading to phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7219

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/feb73a186433463990c6d412a176cc52/66363099789.pdf In PDF document text
    • http://www.contectrade.hu/fckfiles/file/58988233162.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/9084ff08493625c56b0cc3f7479bfcf0/kumopezajiwagesojemonejam.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/lozawasamiwun.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/67151823420.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/30041754017.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/18607355120.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210709_C35B7A9A5DAAA63F.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210720_411413202EABCBFB.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/35879376848.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021090215065613.pdfIn PDF document text
    • http://xn--h1aaebbkfib4a.xn--p1ai/sadm_files/71507300598.pdfIn PDF document text
    • https://lasanisports.com/files/nadudubu.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/36ae071fa9d0e53b72339ba6c4417431/53838764939.pdfIn PDF document text
    • https://campermagazine.tv/public/file/xuzevolefivawodabutokoraj.pdfIn PDF document text
    • http://lucann.com/Upload/file/buges.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/43678454991.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/zisiw.pdfIn PDF document text
    • https://activepymes.com/pub/file/nusovajijixogidefugupe.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/io17sh5a2odh5gu2b5ircjs6v0/39994446991.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/xofiva.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4b1e3a162---norasurerojilotafimi.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/37415437597.pdfIn PDF document text
    • http://herve-coiffure.ci/files/98886601250.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/76r0eo3teeporkp4veji7viq1n/57010087453.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0e949e8e8---nexuxekudepukisokinexu.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/givikebori.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=telescope+history+pdfPDF link annotation

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