Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ce119813e2dae7…

MALICIOUS

PDF

58.1 KB Created: 2021-09-24 06:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bd2b5930f750aeb9a8225b2dd9fc0a27 SHA-1: 01f259a22c5a5ee2c0e859c8fc64f1f6713fac50 SHA-256: 11ce119813e2dae7e7c3ca2b1bb0d8a3804d304d22bb685a31fe041dc5f01ff9
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to various websites, indicating it functions as a link farm. The ClamAV detection and heuristic firings suggest these links are used for phishing or distributing malware. The presence of compromised CMS upload links and disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3485

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=mini+world+2020+mod+apk PDF link annotation
    • http://bige.vn/uploads/userfiles/file/44022212387.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/78610900219.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/negeforurafupasiwomifoful.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614bac57914db---26767223068.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/88944102407.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/lekagamomamofenubu.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/43062587804.pdfIn PDF document text
    • http://artospace.com/pics/file/76987847492.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/6d5063e08fd34a1bc67656cdce98d068/15132178073.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/siresazalusamuwilo.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/53528006857.pdfIn PDF document text
    • http://fxlcd.com/upload/file/50429896270.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/dozevasixasekupelidajo.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/pitinevalasubupidubeve.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/mafunugegenazuwig.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/45271770999.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210912233137.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/wigupe.pdfIn PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/kipumajiw.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/20089052f494f4211f324ac2a5ce487e/lirodubase.pdfIn PDF document text
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/85712378514.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/narusine.pdfIn PDF document text
    • http://secondhandgraphics.com/usrfiles/file/85453896721.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/lutolepisujakunaxi.pdfIn PDF document text
    • http://hopkim.vn/upload/files/sawivimajuboturizedoxofip.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/30626480235.pdfIn PDF document text

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