Malicious PDF — malware analysis report

Static analysis result for SHA-256 18badd19cbac8382…

MALICIOUS

PDF

46.0 KB Created: 2021-07-08 11:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e886112bc937adbbab2da213deae5cb6 SHA-1: b0eaa667f074171ca38da92bd203f379b649f5f5 SHA-256: 18badd19cbac83820431e5d94a48b1e1c26c591adf2b3269d41671aeb3945ce3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised WordPress upload directories and other disposable hosting sites. This suggests the document's primary purpose is to redirect users to malicious content, likely for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6912

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 http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4bbba66e9---rixaradusibabeme.pdf In PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021050308355273499.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e67878378---zumidutomamemobar.pdfIn PDF document text
    • https://wecareprogram.org/images/file/dodizoliruw.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/b6ea7951d707dcb992a2f72be29bb295/21171332387.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/wojagivixitegimafinugubuk.pdfIn PDF document text
    • http://foodsafebox.com/ckfinder/userfiles/files/13939308727.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac4f7cba4b---sarijosizafadifa.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/162364702433970811941.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/94949779011.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/54275255935.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/itqbbbellg189qpk8odvvuphh9/xikodaxisokegag.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd942b46cc---doxezemesug.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16084fe4f932d0---19106216963.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/51204900628.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/de042b832d606621f3f9863620ef6212/rupegezu.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/sejumovorutusuzupo.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/63907ebadfb718d4d3ef35cb509ec834/30814252923.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/24936732919.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=stay+at+home+2PDF link annotation

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