Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72b033a6a70327a…

MALICIOUS

PDF

63.7 KB Created: 2021-08-25 13:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 92b0c9325b915befb6a8d34f99f739a3 SHA-1: 05017b05f937363331d829b6b609e57078a22247 SHA-256: a72b033a6a70327a444b6388d7b3039dddefe9382d867a54c00f82a985e85188
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm to distribute phishing or malware. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9614

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://desushibar.com/userfiles/file/36290069620.pdf In PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/943443d24e981c7341ba8e99b6d3e949/1693855149.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/3714986795.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c7a2cb2c1---55441194444.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/fobadimapivoga.pdfIn PDF document text
    • http://sdes.in/uploads/kenizobo.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210823_0296026F4607A5A8.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/4b215f310d94796dedc8593c6b3ebd46/kazesiwixow.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608c5dde40f6e---20171826992.pdfIn PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/44382134092.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/jobomojifaxubul.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/zaliruw.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/jajelilo.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/muzokunitelojamozug.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160815dfad81e1---80913676746.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/t4mnnn3798hn6cm18ne2um6sj2/pupotogunavefak.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c435664c93---dofuwazemezexisedutafe.pdfIn PDF document text
    • http://bakoca.hu/files/file/17134713595.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/41015581076.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608617326120b---maxivofifirudememixaz.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f600d1c3df5---80152469346.pdfIn PDF document text
    • https://fuoriscena.eu/file/19174402401.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/8646342842.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/mefamapimupomomuxexovulag.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/duseliniwudajuwewerakada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=2020+federal+tax+itemized+deductionsPDF link annotation

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