Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c67183217907f80…

MALICIOUS

PDF

42.8 KB Created: 2021-09-02 22:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: dba7c5ee10522f3f3e0d72eb9382f958 SHA-1: b83e5b281ac728bc954a34afc60820a442b1a6e0 SHA-256: 7c67183217907f8003450b5f0489e7943c78d2baff5c15bec657d4d2f4f6eeb1
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and an ML classifier, including ClamAV's Pdf.Phishing.Trojan detection. It contains embedded JavaScript and a large number of external links, many pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or credential harvesting campaign. The document's structure and content indicate it's designed to lure users into clicking malicious links, likely to download further payloads or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7092

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://synerhu.ru/uplcv?utm_term=barriers+to+effective+delegation+of+authority+pdf PDF link annotation
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082651ee1b5d---sapepivazodorima.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/jibefokijofavero.pdfIn PDF document text
    • http://bowlinggreenhsclassof66.com/clients/b/bd/bdf8ab256cd88a603fc2b95a051c5839/File/60046078015.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/20413406836.pdfIn PDF document text
    • http://parkettes.org/clients/b/b3/b30d687fb0e6fb0c44210170e51784d9/File/fijidogaligajizutefixe.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722126cfd9d---pepojuvirawimovasovomi.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6d4c56b46---69757720506.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/0b4c1e939ef8a92a5b5e52fa04e92bc8/zemov.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/70387175784.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/4pvl2pilhqg6hb7sfjnkj2248q/94149043315.pdfIn PDF document text
    • https://fundacjaartfreeart.pl/userfiles/file/koseba.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c9636d019---sopogifolopapafikalenub.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/fifobomasad.pdfIn PDF document text
    • http://hasyo.net/files/file/nezekiwok.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/71821153508.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/69658260919.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/49818998596.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609806da260a8---74825581776.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/12407434807.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/829255681.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/pijojofimemas.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/589f7f2a873d056a0fa5ff566a871573/45393524512.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/xefaxejotalemolatos.pdfIn PDF document text
    • http://thebranchoflife.org/clients/3/37/37a84c4c47f147f839b5d5a44bb1b86c/File/57450531268.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/bizuzotonisedikodoxajaxut.pdfIn PDF document text

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