Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f3e5d253c171a7…

MALICIOUS

PDF

70.6 KB Created: 2021-08-25 08:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: afa8162bed2a7bcda2fd4287afcce03e SHA-1: 88d4ea792792244c2dff9f172f19a4874bb4896f SHA-256: 59f3e5d253c171a7fcb27ef10f7a0e298c24e912e0bc0876d4181f7226ed0173
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution campaign. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9853

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://infrive.ru/uplcv?utm_term=marvin+sease+funeral PDF link annotation
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a78878a4e7---xakowijeberanariborivomu.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/tisuzofodadarozilabel.pdfIn PDF document text
    • http://onsijsselstein.nl/userfiles/files/40142250622.pdfIn PDF document text
    • http://aranysolyomfeszke.hu/editor_up/92700623901.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/s1d4516bhf94qkrjtom7j2u4d1/9014127448.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078539e53ec0---55359339993.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/83370ea6d3e276af480eb06e76bd55f9/pidafalerejixineliboduj.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/a0225d975b247c6b72d2a580e3420858/divevikodigopivetige.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/21553159257.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c111e6cf9fd79e2b8f28841465a1bf93/6302038626.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/pimupebenoxabaki.pdfIn PDF document text
    • http://dlmberatung.ch/userfiles/files/96458159287.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/xuxabawopizatil.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c86f3c9f42---25480585107.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607031edb08f6---59671382960.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/tosixavafigaxikaxet.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/9973716943.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b894770497b---10119122652.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/31902099266.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a8e13d3fd---1193187062.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/wopepugi.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/jiluropa.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/a785778f4e06f2e6f04e288b2b42c0f2/nigufopuxefawefexijez.pdfIn PDF document text

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