Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f7cf35b5b15efb…

MALICIOUS

PDF

76.2 KB Created: 2021-09-11 05:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 35bbf7d9ea5a7efdf189554dba59cea1 SHA-1: fbec0bf9543748d62f17f76fe55cefeb888af5a6 SHA-256: a6f7cf35b5b15efb76016e988ed6d2950891401e1f7f949b90b8e16f0b6455ae
124 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF functions as a link farm, containing numerous external URIs pointing to disposable hosting and utilizing UTM parameters, suggesting a phishing or malware distribution campaign. The primary attack pattern involves tricking users into clicking links that lead to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7754

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://inwebjor.ru/uplcv?utm_term=the+wretched+of+the+earth+summary+pdf PDF link annotation
    • http://atletika-pardubice.cz/files/file/zesoborudusiwadamobide.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/74335319098.pdfIn PDF document text
    • http://nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/jifatezimeta.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/mazulupixarulokebegokufe.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/57080826701.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/33162770919.pdfIn PDF document text
    • https://penzion-palice.cz/content/sowajosolilije.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/3klg2dpl60cqgl08a42rrf88en/13605019612.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/gusigodasagukuwure.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/2435821378.pdfIn PDF document text
    • https://rmduncanrealty.com/userfiles/files/81528044030.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1612eee6b2112c---13441228105.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/70069248031.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/wimux.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/78015556397.pdfIn PDF document text
    • http://artattack-concerts.de/files/file/lusowosalepatuwok.pdfIn PDF document text
    • https://mundolibre.cl/uploads/userfiles/files/50995965615.pdfIn PDF document text
    • http://holcom-wd.holcom.vn/webroot/img/files/44667074474.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/nodimuwudofefonem.pdfIn PDF document text
    • https://tivicom.vn/upload/files/xedulixugudatibetup.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/gezinobuwusikimosulenugar.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/gajabubinemisuvuzup.pdfIn PDF document text