Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d7a4a5f7eccc0e…

MALICIOUS

PDF

47.6 KB Created: 2021-09-28 05:37:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a63399525eb2a977a7c07efe055b8ac3 SHA-1: f490736a66922b428ba7c2b09dd67e03fad0e078 SHA-256: f7d7a4a5f7eccc0e9f7ade0db739ce181c87bc2cb8e2c046a23895bb0b07d050
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to potentially compromised WordPress upload directories or disposable hosting. The ML classifier also flagged the PDF as malicious. The embedded JavaScript likely facilitates the execution of malicious code or the redirection to these external links, which form a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6441

Heuristics 5

  • 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://ljjxmining.com/uploadfile/file///2021091820100472.pdf In PDF document text
    • https://ratosatu.com/contents/files/jijumegexofuvopafos.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/36689022686.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/57468540266.pdfIn PDF document text
    • http://w-mill.jp/images/file/22807904200.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/20578123029.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/66674089810.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/97218600305.pdfIn PDF document text
    • http://hoachathoanggia.com/userfiles/file/83355754515.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614201950edbf---38444593736.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/duzarojoduzeguxu.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/marivewagiminutili.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/kelifubutazig.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/finigoxaw.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/80848729366.pdfIn PDF document text
    • https://ingatlansos.hu/images/userfiles/file/82447572529.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614938558774d---22328955607.pdfIn PDF document text
    • https://successalpha.team/upload/files/95227361922.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614c11cb138b5---12123603062.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/balelubemonuvu.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/litanibatidezazarijuraki.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/35714041007.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff4b7325fa---35357657757.pdfIn PDF document text
    • http://tradotel-riviera.com/file/68845266016.pdfIn PDF document text
    • http://fu-xin.tw/uploads/files/202109260123096321.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=remove+a+filter+from+a+snapchat+photoPDF link annotation

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