Malicious PDF — malware analysis report

Static analysis result for SHA-256 3284e469c24f1b56…

MALICIOUS

PDF

73.5 KB Created: 2021-08-26 13:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2eb4cb0ad33213ed27ae11312c1f94cf SHA-1: 50587a83faf817b640f927a747ee26d636d872af SHA-256: 3284e469c24f1b563c6c40e6169f53828b113361af64b6972767af2bcc1e99b1
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery. The embedded URLs are the primary indicators of compromise, likely leading to further stages of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9574

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://smidgel.ru/uplcv?utm_term=jack+russell+terrier+lab PDF link annotation
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/p4a4550cjc9rac672ihcvv5tbv/xutexaxulurubu.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/24079084099.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae5095940a---derunugemorun.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/57c65727f36d471d5d879e4e5cffdbe1/paromulobole.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/13184128755.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/wexepufep.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/8683712239.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/33232892281.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/ogff8kjd6hnpv8gunu5o4rijd7/rixosipamixufixuv.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/vusijofuvepomijetivusanof.pdfIn PDF document text
    • http://wawa757.com/uploads/files/93270516190.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ed44e7f78---94217258100.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074ff26367cd---59780701892.pdfIn PDF document text
    • http://cmtoolsrental.com/user_img/files/bupasegobakiz.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/78985465872.pdfIn PDF document text
    • http://alltechsro.cz/files/fupafexazadef.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/13437987477.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607ffa39743da---kanopaxazowusikeriputevo.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e37dd6cc8---rivufanogiwufuxum.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/4666c7188a018e526cb6e9990ffa78bd/29694329104.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/zesukadasutatepopas.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/tuxapikujobazujepil.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/97793371924.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3b1769f5ad08253ec87a17b8333e512/peporabunitakuzotoxe.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/5ab16f8k2etde1gbhgl457h02g/kunanowuga.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/lofedabosizojejemunodegi.pdfIn PDF document text

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