Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eedd7e48be16f61…

MALICIOUS

PDF

62.3 KB Created: 2021-08-23 16:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c6955b8faf6f5c591ffb25cfdd5591ed SHA-1: b19dc36f91bdac8aae14e2d34c4a06fcde043fcf SHA-256: 8eedd7e48be16f61ff34ec67fd47b1d72d91816848078f356f9587464661dce3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it functions as a link farm. Multiple URLs point to compromised CMS upload directories, suggesting a distribution point for further malicious content or phishing pages. The PDF structure and embedded links are consistent with attempts to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9569

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 https://crewmak.ru/uplcv?utm_term=bad+resume+examples+printable PDF link annotation
    • https://cherrychile.cl/cherry/uploads/contenido/files/74510241703.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79132328929.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/e9eb22c39fa922d39d270e456a349819/vomotasoribe.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/55579940348.pdfIn PDF document text
    • http://cmtsport.com/pliki/66317615288.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/69629625546.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160764fa4c976d---94735953187.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/3cf1n1oje72o0j50h2b5hltfur/benidokefawonenugiwet.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/69259118314.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8eb5c1645b---66983268011.pdfIn PDF document text
    • http://bronia.org/userfiles/file/77054719800.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/d5f317273d93436ea402aa70d245a342/memiwemedefudalozikudasa.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/64208510155.pdfIn PDF document text
    • http://romento.com/uploaded_files/userfiles/files/21112622411.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/tijogikinorobemosiribukub.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/xexewunurivezi.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/l644ar4mjc1do2qut7hpchjtc2/jubada.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/l72rqcdbneh3an562ulrerkj7r/kewekodatagove.pdfIn PDF document text
    • http://solee.cn/ckfinder/userfiles/files/40569603608.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b9b23459e---vedebevoveregisikonidulat.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f23d3fe57---xemuxebopado.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/5c8bbe2bef68b167cdbcff38382785a1/56911749360.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/boroxo.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/26998260890.pdfIn PDF document text

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