Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef8c28c2b27c4c6…

MALICIOUS

PDF

137.1 KB Created: 2021-08-15 18:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 249c40eb096c260b299d3b2ffcb16232 SHA-1: 0c593ec2cd9fcf965af33fa01e26b1f18a2f6b33 SHA-256: 9ef8c28c2b27c4c6e986d144c11e5fa5b52bb59efbb5869b7541ffe3d1266b27
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards an attempt to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9534

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://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2563ea97c759860a70c6fdb3054b3e9b/zurotufojekami.pdf In PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/c96aea413edf157acdaa5cda31e50f41/bijamopedudufiz.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210630030920_9kh1bb.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff6ad8b4b53---49737995601.pdfIn PDF document text
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/42522803633.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/toforefujisenefevuwa.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a041f0aba8f---62481337014.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/lamovigonekepanudozaruw.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/3f178962860b9162b1434bab5a448bc9/30783076724.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/a745fe13bb825216391a1a6362e5f3d9/7729387215.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/xefaduzopaj.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16091053246dd0---bimogadibijuxepukib.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/xivasuvedoro.pdfIn PDF document text
    • http://rc-modeller.se/images/file///pogajidomonikorax.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/sinofak.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc698bedb8---32418547072.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/segojibikutugowobuxetiji.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/dovefusewusokidikigolida.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/aqnso437jq7pph7j1u898g0okr/jikot.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5af925e1b---37720690924.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/6866654b9a4decab693b30372c7607dd/bizakeja.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e5197e90ff0---tipefupakipawag.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e6fcb3f6c---sulukudenodu.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c6d07f27e---jesajidisajumu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=cambridge+igcse+mathematics+core+and+extended+second+edition+answers+pdfPDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.