Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa109cba8b51522…

MALICIOUS

PDF

64.0 KB Created: 2021-07-08 13:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fe7e957a4da83c768130604bfad7f643 SHA-1: 5ad76562c19b83972588a5124a4a937e888949e3 SHA-256: daa109cba8b51522d051b2e354cbb2a8437fa3ba0d982d8c201d1eb842e40d47
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is identified as malicious by ClamAV with the signature Pdf.Phishing.Trojan. Multiple heuristics indicate that this PDF acts as a link farm, hosting numerous links on compromised websites. These links likely serve to obscure the true destination and potentially evade detection, leading users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3846

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://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/7k0k9tijfc3cfcbhji38g0ob55/norikogefanu.pdf In PDF document text
    • http://pphu-joanna.pl/fckpliki/file/98101525272.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/xorife.pdfIn PDF document text
    • http://domplus.su/userfiles/files/68804175740.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce20486aa2---1893375893.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a258b988696---togemojepubagoxadida.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/fuzovumejumiwe.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/47919109898.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/1b9baa4de21c214027dc5e9d4c47d277/zovef.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160920d728607b---fuvudopipawivimaxi.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/fatapanipuvoxori.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/eo0mcofvjlqliqothrpo2n1h4o/58071737913.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815a8e52382---20321104623.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/38567437643.pdfIn PDF document text
    • http://planbmedia.hu/files/36007617333.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16088afdca0540---14208954519.pdfIn PDF document text
    • http://meechoktoolmart.com/user_img/files/74261787378.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1ffe08dcd---52514420581.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/83422262464.pdfIn PDF document text
    • http://cintabogor.com/Uploads/userfiles/files/zarikezurazuregigolebek.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/b8upe90bktot9lbf4pj04ep012/64527421709.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gibimuvofedanitedomazizub.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160860469e0b2c---71199118417.pdfIn PDF document text
    • https://nhadatonline24h.com/Images_upload/files/57984150072.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/84940119924.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c50c78a9e---57023254605.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=itching+in+left+side+of+chestPDF link annotation

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