Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e6cf22c5ad6c5b…

MALICIOUS

PDF

80.4 KB Created: 2021-09-07 06:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 90a2557feefabc7d75ffcdc9e5a26fad SHA-1: a3a9e28e286f59cf3e9f56ff4c155dcca0975f74 SHA-256: f1e6cf22c5ad6c5bb3b32e841dd18a6a37462f0e76d505a2b7ef3f80f8f6f6f9
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 an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs hosted on various domains, some of which appear to be compromised CMS uploads or disposable hosting. The primary purpose seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8548

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://smidgel.ru/uplcv?utm_term=mountain+ranges+map+pdf PDF link annotation
    • http://chinalabware.net/d/files/9341356004.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/9d1490d089deda8f3b5581118c398167/91875552067.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/duguwumoku.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ccd4b0eb292---49124496035.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f81d37c63a---birogowifow.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610b31f0089d3---41135034463.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41c80ca386---67435730547.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/sunajigo.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/lebikak.pdfIn PDF document text
    • https://ispartaprefabrik.com/ckfinder/upload/files/jezete.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/3eaaf76356b11790c4ab5de2e2f51805/86164629965.pdfIn PDF document text
    • https://micsys.in/userfiles/file/xorebubevokasumetubokiwuz.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/95754149593.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/b15e21ab57f4798a9d390a9e2bd4da57/88116092655.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/96322441051.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/wamesi.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4e2ab75b7---73213423646.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/49024862803.pdfIn PDF document text
    • http://clinicoral.com/img/userfiles/files/temumuma.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/14064083500.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160893b31e3e38---julosunofonemununuweri.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160972d3bb9953---78705234788.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021726743345233.pdfIn PDF document text

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