Malicious PDF — malware analysis report

Static analysis result for SHA-256 97adb29b1cb08211…

MALICIOUS

PDF

59.5 KB Created: 2021-09-04 00:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: dca0ab9d35307ea6268f97b661bc8fdd SHA-1: 9163f310e9d8d552fff7c805cc46e53d86dbcf27 SHA-256: 97adb29b1cb08211c1b95741e8ff32ab64db24593ab16d417988fea84d117a04
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable domains, suggesting an attempt to lure users to phishing or malware-hosting pages. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6988

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=social+enterprise+philippines+pdf PDF link annotation
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/f7d508d21bcf7be090a6f1fddebf6a27/55706625686.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/wobabaradizenadosele.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/16501037697.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/20/file/20210520_202231_117.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/nogubuta.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/95644367341.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/pibumitidufigofaxevas.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/95011116107.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608297c2cf47d---48613655752.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021724918369030.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160a83bccc4853---7974177909.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160d611a48f808---91641927970.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/e0bd955c5b9966135b704eb3df8de3ef/fumuve.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/sapom.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/44833184464.pdfIn PDF document text
    • http://stembridgefamilyreunion.com/clients/0/0d/0db03be1a97f3028174cafb645c8c91f/File/varitifofetiraviju.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/irnu68sj8ejt8fadni8ov1cjvv/12652450372.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/5585a3403ecc10d9e28ecd40eda52323/menaketumowemotano.pdfIn PDF document text
    • http://smeclassof1987reunion.com/clients/37165/File/nomenuranuzuzonewaw.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160906505db395---vagubepubenixulevu.pdfIn PDF document text
    • https://kawanmto.net/contents//files/9455183179.pdfIn PDF document text

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