Malicious PDF — malware analysis report

Static analysis result for SHA-256 751e89c6e07485cd…

MALICIOUS

PDF

50.3 KB Created: 2021-08-09 09:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 09b0660fd109b447597649f71d0bf24a SHA-1: a89237b164ae19525a56692f80caa243807a5bc4 SHA-256: 751e89c6e07485cd8cfb372f3848d9d737bd771e2eb0360f839d124acce397e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to potentially compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. ClamAV detected this file as a phishing trojan, and ML classification also flagged it as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links indicate an attempt to exploit users by directing them to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7324

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 http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d87b92c732---gezezemixarazezovufa.pdf In PDF document text
    • http://brilspa.ro/userfiles/file///nonakawesivumigu.pdfIn PDF document text
    • http://phillipsbricksalumni.com/clients/56168/File/zuwozufalusagab.pdfIn PDF document text
    • http://alltechsro.cz/files/19894305700.pdfIn PDF document text
    • https://bbgpiti.com/userfiles/files/38027587794.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/dojufikepabiwoxika.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/17269749527.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3517cc4b2---98401880185.pdfIn PDF document text
    • https://ei-hotel.com/free_images/files/43492778437.pdfIn PDF document text
    • http://minicabii.com/survey/userfiles/files/88475393569.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/79240197352.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cbd76ff7a---51210224280.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4551e51db---65097155360.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0c19032ca---lijulupit.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/poxolixowowajora.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/au7c2m3tsfl7gh6aomhip0j3o5/luxabuluninof.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/hqpba1bt5e19psh1iiepll440r/18981048566.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af28e937759---17160488465.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/80050747682.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/8369321599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=fifty+shades+of+darker+hindi+dubbed+downloadPDF link annotation

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