Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33b53a0de4609fe…

MALICIOUS

PDF

60.0 KB Created: 2021-08-26 05:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9964190759902c2aacbe2a48d8e1ee98 SHA-1: 3bb9820d79779096f8d74b908f6d3dce643f2cd2 SHA-256: f33b53a0de4609fedbbdd0464286c28e12eb9afc7ee595439c68b06b67482e15
154 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous links, many of which point to compromised WordPress upload directories or disposable hosting. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of a 'utm_term' parameter in one URL suggests a phishing lure related to downloading cracked software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=document+scanner+pro+apk+cracked PDF link annotation
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f022920b1e---79315207962.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/73641167384.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/paritetejomokavamuliveda.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021060123050873499.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/gosinug.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16084226058953---48216903574.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/litakararurobilawituto.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210817102641770.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/42591990539.pdfIn PDF document text
    • http://bwc.lt/i/5080363188.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/kimikigogadolun.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210807034911.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/vinag.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/64223057179.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bd7f80658---dikimerezavomuzumifixenix.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/ea28de97e56acf078d563a86c26b31a0/jutebip.pdfIn PDF document text

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