Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2e9c7106e68ddd…

MALICIOUS

PDF

50.2 KB Created: 2021-06-30 03:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 24809d06a5c3ae7c30541c60770a4a55 SHA-1: df4fb7d6dbbdf1eeed5ede12ce476aef939f9409 SHA-256: 8f2e9c7106e68ddd20608d405e17528b46cd44f59125f38c4c3ccaa3e04a4fb2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or further malware downloads. The presence of multiple compromised CMS upload links suggests a tactic to host malicious files on seemingly legitimate but compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6227

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://crewmak.ru/uplcv?utm_term=daffodils+in+snow PDF link annotation
    • http://woodwork.pl/ubezpiecz/obrazy/file/9339914826.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/gudasusajid.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/tageponifudilomeleb.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff688de77d---zonosivupiraxaj.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5cc7de814---82186902493.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/66293675618.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/fe5g2hta91ngkp1h9v6ifhu6ap/lavikuweduzudameto.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/61862916631.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1e9b58f62e5360d0409706284c0c2314/10675248550.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/xedijumelamedakoxobasobob.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/74680736604.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fabaf22d0b5868bdd934256bfd37e921/65872747568.pdfIn PDF document text
    • https://tl-systems.hu/files/files/tunumizigilaganu.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/22126a25a7f040368c04d5fc4cc617a1/sewudufebudukafurenadanin.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/finulatata.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/novamobutovexasukoxeveri.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777a5976d80---muwogifanunosefebuga.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/aceb55b1e9e21c2eaefd9a3409656944/49597891305.pdfIn PDF document text
    • http://goref.ru/files/file/toverawubaguwadakokopiw.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/ec53172e5a07f853ae52c3f37ef9ade5/10033029752.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ed81e4d4e---84487377791.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160adbb8dd9705---93093451210.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/84258367028.pdfIn PDF document text

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