Malicious PDF — malware analysis report

Static analysis result for SHA-256 337e7fab0b6bcbb0…

MALICIOUS

PDF

126.5 KB Created: 2021-07-31 01:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 77a1d6f4a611d8093f4986ef6a901350 SHA-1: 10b480bd1ba7d5eb80d5070ba85cc9c17868336b SHA-256: 337e7fab0b6bcbb0753529111118a9419ab3e0f63475358b99192725cabb3d14
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. The embedded URLs suggest the document's primary purpose is to redirect users to external, potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8732

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 http://www.lugashotel.com/data/editorfile/rukojevedixavagimogumole.pdf In PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/03f4ff9036e421a98087de7d520a071e/48856255332.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/vupoparesebexokigobi.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/33948964063.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4a5ef6e37a---kepulukubikeguvonuravaz.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c148810121d---guwum.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071956eaafe4---12205173001.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b49f125ff30---numexufelabiguma.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/58901607273.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/q159mjli17onr0mhs1q9bccikr/51984622864.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/fdc70dd7dbad21129dd7dc5eed5b01d0/69640760320.pdfIn PDF document text
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/litetoxopimutoxep.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0bc47fcfa---gevifixijetizusawajulil.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/5133616352.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/58721445931.pdfIn PDF document text
    • http://samtle.net/ckupload/files/93351433124.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/voxawepevamavugefiliwirod.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082b6432852d---63065083292.pdfIn PDF document text
    • http://d4sontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/6713422831.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/gawesise.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33e54673a4---42436705890.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/desuwibutixuwuzobunazeg.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4aecde0c857488d6be141de0f4126480/xoxikowiwagekozebibe.pdfIn PDF document text
    • http://lhsclassof1971.com/clients/74120/File/48508299961.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/47105994592.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=plumber+pants+game+instructionsPDF link annotation

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