Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c0c2076d340b47…

MALICIOUS

PDF

63.7 KB Created: 2021-08-23 14:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 92f224043de6be38b042bf1ca8d05123 SHA-1: 12d1340d62ec9eb10a243e9e46a12d460700415b SHA-256: 88c0c2076d340b47e707a6246dea94b38c55a7b3223d4c11eb66bcb980a16e7b
154 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content or phishing pages. The presence of multiple links on disposable hosting and compromised CMS uploads indicates a deliberate effort to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8063

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://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/0l0m96h1jkmbo51nuov8nndhc4/dukegebuwipirix.pdf In PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/b2p74p47n0s9abbmpnv0di3hgp/bijenugugovep.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e52db0414---zarodabiwujumowot.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/c57702d546c44fdea4a35b7dc249e784/84601216779.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/cbdea3cafd930688f6a8409b1cec2238/mujawabobisofikotagaw.pdfIn PDF document text
    • https://associazionebriciole.it/public/file/56519907747.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021712110431890.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/10968846911.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/midipowupefomufibatejape.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/809e146e5a292ab9c6bfe306dc720bbc/26534348943.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/turenodejosaxese.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/11911109435.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e02112f001---juxidejijukiv.pdfIn PDF document text
    • http://hillandbrownfamily.com/clients/76964/File/39023428859.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16089d7f328e13---82269033843.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210807073633_syh1a4.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bb385e270---ximerusonesodetajilujod.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/rokud.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089760cb1b95---wumebiwafa.pdfIn PDF document text
    • http://d4sontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/bomokur.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/56911012538.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=genetic+variation+in+a+sentencePDF link annotation

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