Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcfcbdf0bf1df63…

MALICIOUS

PDF

45.6 KB Created: 2021-09-07 16:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: abe2f92b13ca60ca96df3e3dd7dde3f1 SHA-1: 80bc165d297760ebdbcc5ae84fa0260b241baf36 SHA-256: 9bcfcbdf0bf1df63525480e4299bf5af847cc0d09f40c83d3b33e167a153af76
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. Several heuristics indicate the PDF is part of a link farm, with many links pointing to external PDFs hosted on potentially compromised or disposable domains, suggesting a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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 http://carshopm.com/js/upload/files/4090526133.pdf In PDF document text
    • http://wallawallahighschool1968.org/clients/75819/File/99316253260.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/tovobukarokitokavunik.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5b9be0dcac6211acd29d5f889f8629c4/82019832232.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/d88f281683d7f233435f9ad5a4ea5b8b/29874746104.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/velubefaxufawulijifurej.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/31249515186.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/65540704047.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/jewit.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/71e7fe928677ba9d7eed1bebb5ea12da/19152268371.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/muxunusamaxero.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16114389cdfe8d---47675257171.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609448819ac0a---tanodadebetukagorezen.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/29010521841.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16077e75b6ead9---25390567467.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/63513515553.pdfIn PDF document text
    • https://ijpdua.com/contents//files/41317622820.pdfIn PDF document text
    • http://sakem.org/userfiles/files/jenewum.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16105dfbd89773---92193447585.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/7466555825.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/zuxikawilirurej.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/45170947275.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45905089340.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/jupijixi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=italiano+per+stranieri+pdf+eserciziPDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.