Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ae9c2b0b3d4578…

MALICIOUS

PDF

93.1 KB Created: 2021-09-07 11:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0761fd6e37bceb2439c41827c062f024 SHA-1: 573c202d0a6ffdea5418e5e798fe69127a4f413c SHA-256: d9ae9c2b0b3d4578204d8f3208c8eb97d0f00299c185940c02a1496a858c978e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to compromised WordPress uploads and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to external malicious sites, likely for phishing or to download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8441

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://catamma.ru/uplcv?utm_term=prisoner+of+azkaban+pdf+google+docs PDF link annotation
    • http://shavers-boles.com/clients/7/73/73b1ad2e2c85410b7b015c0c79a6caf4/File/23921521803.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/vipagokifeletugo.pdfIn PDF document text
    • https://automatisme-portail-bordazzi.fr/userfiles/fichiers/pizipovituj.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb8534fdcf---76553848723.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/pupepofebolideg.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/21529337318.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082477cf1cc6---69840224884.pdfIn PDF document text
    • http://aimic.com/userfiles/file/75399858382.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/69993654624.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/lidixutavupomuduj.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/rvapnf56ntkvk94tg70s2cir6g/44240545131.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/57220901241.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/zegekevibogodomumijilodus.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/11654717426.pdfIn PDF document text
    • http://jkohut.pl/file/87699487093.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/kusuzadafapizij.pdfIn PDF document text
    • http://badgerhillfarm.uk/giduwudisarotejife.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/97435343239.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/52697333529.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/93449597025.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/94743607747.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/70708446085.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/jedowozigabogorejuzi.pdfIn PDF document text

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