Malicious PDF — malware analysis report

Static analysis result for SHA-256 8281a4702626635e…

MALICIOUS

PDF

71.8 KB Created: 2021-08-11 14:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e64585849a2e88ee3aac78cca2b74050 SHA-1: 43779a7677d81c405b4264a5dc676269b3f894bd SHA-256: 8281a4702626635ee558b7fbe40076d4bd81d7619c939739259faf0399fcfaea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, directing users to numerous compromised websites hosted on potentially disposable domains. The presence of external URIs and link farm indicators suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8831

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.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a84485212a6---zikefodewi.pdf In PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210522220258199.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/ce1e0398468dca2ad0c2d3431f36ea52/98569792573.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/48978431381.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a535cb2a44f---fetapotidanurowisujag.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/6fe8848658bae4600a0b740d3cbeff86/6544719121.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/fofadavinefovowizus.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1b2de5158---tozijefisez.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/babobowixesovopupo.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/5c4119503545d729c4aa9306cfdd8ef1/dovofuxamexoselewuxegav.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/50561263595.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/tozuxamejekoxabujomanugu.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecfcf04d73---xaviju.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a86f8a72ea---movib.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/dowagufo.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97d8b70ba2---pisunolevobak.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/772898107c9d795c66d7c0addbf870d6/pudexadoxezadozabid.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078b0fe14532---domubibada.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b474409b35---bolamifepuputakavenir.pdfIn PDF document text
    • http://fitviewer.biz/files/file/nuwijewuvebenituborelob.pdfIn PDF document text
    • https://shoreluxurylimos.com/userfiles/files/11707957138.pdfIn PDF document text
    • http://erictex.com/ufiles/files/loxifunejigi.pdfIn PDF document text
    • https://alajuusa.eemedia/contents/file/kukor.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/c3d48eb2c9b43cb6c38408a277b36b27/43385296607.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aebe411e6b4---50076965991.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=what+is+the+nature+and+scope+of+sociology+and+anthropologyPDF link annotation

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