Malicious PDF — malware analysis report

Static analysis result for SHA-256 23aaa040c2e3f796…

MALICIOUS

PDF

54.6 KB Created: 2021-06-11 00:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 386c47bb6ad6a76c04d130f7b957dbb4 SHA-1: 7060605952c9f65edfa93937b5aa3a8fd96bb83a SHA-256: 23aaa040c2e3f796a1487e9a4a4c6ea6a4dab1934da07f8da8df86a524e13d89
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting it functions as a link farm or phishing lure. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7084

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://ketchas.ru/uplcv?utm_term=5+point+star+template+free PDF link annotation
    • http://ankurgroups.com/userfiles/file/pinasitav.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608068a076850---pazogepuralivemiva.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609247884ebe5---62542097926.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/binafelolu.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/jv62eo2phjgjv312brfe3a7a04/ramup.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608377a6f124b---nogezuzuxata.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/177f3ae08d99af41d3ccde40eb5025ee/fagonunelibe.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/c4dd713c48b7e8812bc2c6ba635ea77a/wetenadoxaparuworasa.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/21398096427.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8377b7ee07---20183584943.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/b1860d407971e41b6ea002d2f99bb94d/11503642885.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/tezogatutifepa.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b42cd9f68---nifofenijukid.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac838562359---5858715420.pdfIn PDF document text
    • http://primaneighbors.com/userimages/nananonimubilabaxikel.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/vulunajotawepuwex.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/a23b5d906f91f46202cf7e77da923d9c/33656285826.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777f439164d---surufafisenopi.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/49029111838.pdfIn PDF document text

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