Malicious PDF — malware analysis report

Static analysis result for SHA-256 9877ad3582c8f21e…

MALICIOUS

PDF

66.6 KB Created: 2021-06-10 08:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a924bd3b3e9c8652b61c7fee9e037fbb SHA-1: 9c9fc177adf5fa9fff55ce2f0dbb9164987945ae SHA-256: 9877ad3582c8f21ecfd45326a9defc753506ed8419dc1b889ce22650e554c8ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised CMS upload storage and disposable hosting, likely intended to redirect users to malicious content. The embedded URLs suggest a lure related to 'android wwe 2k20', potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9729

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://drafthe.ru/uplcv?utm_term=android+wwe+2k20 PDF link annotation
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/794103b2869e7c17429ee1acb3c7cbdd/30327312483.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bce0c349731---14535471110.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/80899736749.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d75e43e99e---85657694940.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/devid.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/33349365581.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16098278105069---wukatemika.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/affc767d715e013bd031666e7c9e16f7/sutufidaxilozapupamazufa.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/d14b51e0100196d8586601889bc41a9e/zububamipi.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16078563e757b9---bivelemikipidaboko.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/17255003838.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85e6eab75a---27307414990.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/54906282589.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/5c0c26886f3b3e454c5cb0ed07f0becf/xebekede.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/481sd6r5johser7m29lsrfdg4t/62882652010.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C5 4820 bytes
SHA-256: ce191317bfa793b857b91342dae2f84306b67e2816dd0f9cd56d2a87786005bb

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