Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d84f86f897d4dbb…

MALICIOUS

PDF

45.6 KB Created: 2021-09-05 09:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d258e752a177b64456159d00e506bb19 SHA-1: 20afb394fb05adde82218b3ba593f02ac2b62dee SHA-256: 8d84f86f897d4dbb67fb7278026ad60d1ddbca775773f0b8640acf1dd5d7d412
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised or disposable infrastructure, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://dj-venci.com/uploads/pages/files/49997026173.pdf In PDF document text
    • http://nbc.com.vn/ckfinder/userfiles/files/fulas.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f2bc5665e---66847954015.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/94273467605.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/a1846b6a203f66e1b6db0944ea5ef16e/30097027097.pdfIn PDF document text
    • https://xn--8--clcp3bi.xn--p1ai/files/bujobig.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/93582580204.pdfIn PDF document text
    • http://dlikefulproductions.com/clients/875850/File/75670711271.pdfIn PDF document text
    • http://waterreducer.cn/d/files/83908894488.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/82824559321.pdfIn PDF document text
    • https://studyhalltracker.com/files/file/63682381188.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/naworokununakekuvevawuja.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/wuboxakiba.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/lomuvosajoterewobejitike.pdfIn PDF document text
    • https://giyimkent.formenemlak.com/upload/ckfinder/files/91577470836.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16089f3ca6ccf6---70239944721.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/fuveganajo.pdfIn PDF document text
    • http://scholl2021.com/clients/1/19/19bca4f76d5065ca3bffbfc1c67e7925/File/wobefutuzujovigiwesew.pdfIn PDF document text
    • http://kramor.bg/userfiles/file/gujiladekuwobudiponiviv.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6772919836---87524167170.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/80200047243.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/5293213766.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/patete.pdfIn PDF document text
    • http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/buzajaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=rock+salt+benefits+pdfPDF link annotation

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