Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2e7f29f8e31e30…

MALICIOUS

PDF

63.8 KB Created: 2021-07-29 22:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 856473e3a0707c62108382c43085767f SHA-1: 91967fd347c319269e07414925f1fec612231f84 SHA-256: 5d2e7f29f8e31e30223ddde1e09a683f851c61d210fa8f98674f2672df8b784b
174 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable domains, suggesting it functions as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms points towards a tactic of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9593

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://st-communications.com/ckfinder/userfiles/files/30630161732.pdf In PDF document text
    • http://caratow.eu/userfiles/file/63542083901.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/26011698320.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/626daea02d9566164bca8516d5087490/28164902462.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16086e1735f507---19134342935.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/60627891695.pdfIn PDF document text
    • http://autavrabek.cz/obrazky/file/vezok.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/a0500cd27c8a39a18133940d043c436f/roxubemareras.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67ae53e457---9633060363.pdfIn PDF document text
    • https://collegemahan.ir/basefile/collegemahanir/files/gomubolalogilidagimug.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/47f0b13f550a7b2c7c93c1fd83d41412/45549053643.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/dezogibugipunudogase.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/popepojunineloke.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d07cb0610---kexapukawufaxa.pdfIn PDF document text
    • https://pestresolution.pt/site/upload/file/47380293018.pdfIn PDF document text
    • http://stylekd.ru/files/62141164207.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b2caccb9f---78846455849.pdfPDF link annotation
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/31768923395.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/bd494871b17c6cbb432b0a69565d0499/jegavuvu.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bizixipox.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/duliz.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/79604159686.pdfIn PDF document text
    • http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/46557362527.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=guided+sleep+meditation+jason+stephenson+for+lovePDF link annotation

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