Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d2cdb229c54caa…

MALICIOUS

PDF

48.4 KB Created: 2021-09-21 00:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9ca4f14d11b645e762e378bfb0d2849d SHA-1: cff426643a660204d8a7febb76b9cb409c6b6a9d SHA-256: e7d2cdb229c54caa03be0647ad3bb483994b99d8787893e4fd68dbc79c0c1471
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6237

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=find+hidden+apps+in+android PDF link annotation
    • http://kbo.pl/ckfinder/userfiles/files/44977124372.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/dd5fa627107be6d5887179d66efdfbb8/80770501984.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/ffqf1dpnpirr3kgd555kqi2vk0/83087422956.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/49175266219.pdfIn PDF document text
    • http://khocabien.com/uploads/files/gunolabawijepi.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/gigepezunukapuwaxetipo.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109140751032328.pdfIn PDF document text
    • http://gemcom.org/userfiles/file/75429338812.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/53285400546.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/pedibuwaxeloz.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/jegodofinanuxogexobetuvi.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148f7bd54dc7---18743782340.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20210919_9F8593AA9685A34C.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/161358fb490e69---56447055788.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1ae409295---31261862156.pdfIn PDF document text
    • http://www.77ice.com/upload/files/59439372908.pdfIn PDF document text
    • http://thegoshow.net/userfiles/file/vixuwos.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/37947924953.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139d1c77a454---xofididewolozis.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140ef8c01524---44525848826.pdfIn PDF document text
    • http://mywayrtk.org/userfiles/file/60200887078.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/fowefelenifatubipoda.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/26919041658.pdfIn PDF document text
    • http://tichdiem.surecare.vn/uploads/userfiles/file/mutez.pdfIn PDF document text
    • https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/44365042337.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/jusununutudi.pdfIn PDF document text

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