Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec7c41839f0b0ca…

MALICIOUS

PDF

53.9 KB Created: 2021-07-04 03:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8ad3b1cd812b44840e4a5330ff6d08f5 SHA-1: 312ea87299c2e0acf9db0b1e86962307bdade471 SHA-256: 4ec7c41839f0b0ca2aa2061fd619fe557e79d3dc4efab2d136bba91c9145f4d4
154 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a link farm, with numerous URLs pointing to compromised WordPress sites. The ML classifier also indicated a high probability of maliciousness. The primary attack pattern involves luring users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5894

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://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ca40d773067---ritili.pdf In PDF document text
    • https://noddy.nu/images/file/lilovak.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/46984354861.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab46527e5cb---jivogofe.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16071f66e1d1de---46420921518.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/23641511473.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/6152856808.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/jb3kohsm1al171pmdam7mgikks/sapenawolew.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608321a08c298---vinamusopufuwazowir.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210515/file/16210513019168.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/sisuxegi.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb3e37c384---kivonelakeximud.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/h0ms3enpvonq2vg6h0iottqvh1/93720625978.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/95dfa39c0a5e7cf4bd472c3a4d128b5a/fusufegezel.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/nilinogitulalozefa.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/22891297453.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210605104910.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/mvmf4d28hv48al8sgisft6ll83/gazasumeko.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cba51575a---geduwo.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092a90f9258b---xinawezez.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a00ad9adc---74428508637.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/foboxanutokuzusata.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=does+a+carry+on+have+a+weight+limitPDF link annotation

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