Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb22e76b124df00…

MALICIOUS

PDF

78.1 KB Created: 2021-07-17 11:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: deaeea0ba61d013b3c8862af3d78f8db SHA-1: 6d68b07b70e277b454310fcbe6d8b05cfa5fa341 SHA-256: 3cb22e76b124df00e318abed3cc156734c99625555717e5eb91c7767e9d9b272
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan PDF. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting a link farm used for distributing malicious content. The presence of embedded URLs and the nature of the heuristics point towards an attempt to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6770

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/ca78dc06fdf4af9f311ef766ebd20c6a/pojetunabo.pdf In PDF document text
    • https://datawire.gr/files/files/vikusopavigogujetujoz.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb47a309495---sijijigupedovuxef.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607089fb33e1f---94777811792.pdfIn PDF document text
    • https://agatanorek.com/files/file/jopeputafowetexuvebuk.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f80801589---zigimuzu.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac5f8357da---92820988011.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/43405472280.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/941fbbc8608c9bf7514fc6d5a24a1ffe/gatulumuzurefopujezosakaz.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806214adddd---48939954272.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/c0jmetb5p9il4hk6jsnrnligf4/repox.pdfIn PDF document text
    • https://pestresolution.pt/site/upload/file/lexawobizokolat.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/5eee389b9602d4f4c07e79f7d867a937/57077152751.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160721cb2c21e5---75243981372.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/9ce7aa321386cfb6ad62554bea5b384c/digolonufegovuku.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f203ff578a7---61337202338.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/6ef1640dde3ce1cf8e577e07ff8aa036/13742453163.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-24/20210624103642683253.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/luzefajazuwu.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/wifozakufugotejotafu.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/roganulefo.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/senezezurorosijapa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=cv+with+extracurricular+activitiesPDF link annotation

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