Malicious PDF — malware analysis report

Static analysis result for SHA-256 7830d051a49c03ad…

MALICIOUS

PDF

63.6 KB Created: 2021-09-09 22:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 841acf4d1182e99d6eda5b70196e908f SHA-1: cb19e701bc8d55cbc6861822895f9eb2dc3b58d2 SHA-256: 7830d051a49c03adb72d208f5ce11c32af4edfc652d760adbc23aaab20603756
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users. The document also includes numerous external links, several of which point to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6381

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://rrr71.ru/upload_picture/janatepoxipobuzutemuda.pdf In PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/92030972104.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/32554605320.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/demelajogozodewominufu.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210906_8CB0CD6B85271B60.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/60704893836.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/51955090417.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210908154425.pdfIn PDF document text
    • https://derfo.info/resimler/files/vewutakawawekedefiwusup.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/disevaxebepotoxoj.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/59945546744.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9615419484.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/jomilusexor.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/mulorolunojeguk.pdfIn PDF document text
    • http://shoreluxurylimos.com/userfiles/files/80867151730.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613222e7c8ee4---85843656802.pdfIn PDF document text
    • https://happen.webasl.com/userfiles/file/59932352927.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/11677328249.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/9416800627.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/72182856979.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/jemeguvigefaluzu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613012cd46973---82026089443.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/70001958867.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613807666fe34---wapeviwige.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=bagan+keyboard+download+apkPDF link annotation

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