Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad57e6dd9d859639…

MALICIOUS

PDF

42.1 KB Created: 2021-05-28 15:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7809501e0b49a255e49e167aa2dfd21c SHA-1: 0b260ec470e175bcf113f46efa4654d52f1f46d1 SHA-256: ad57e6dd9d8596397058aa3346d6f9deda782fd69b947df88e39d8a4721b60e0
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as a phishing lure due to its structure, which contains an image-only facade and clickable links. Heuristics indicate it's a link farm hosted on compromised WordPress sites, likely intended to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript for malicious actions, and the overall context points to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8943

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/m1vc151hco6j5crc6e2skgh1ij/nidowazimonibefat.pdf In PDF document text
    • http://asupuro.com/user_data/image//file/voxivefiwilukigajuxifito.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/6uiqndk4ee90uaqf46djfbjs16/tokewikoluluvidifovivog.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f76f11a1f2---34309931452.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160946419da18d---getodix.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/bc61efe2a017ea65d0a63a09bd5b3740/dogivuzovadefeseregipeded.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/bcph9aofniq9nmlv8ut2qu4me7/vafanijejewumixatamaxudab.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/a17f4c3d157309b44659753d0470a7c2/vuxutemijemogixaruxus.pdfIn PDF document text
    • https://egf.tw/test2/images/file/72400672412.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16074c1ea83e9f---79492958006.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6b6c6921a---pelanavojomuzok.pdfIn PDF document text
    • http://vodnik48.ru/content/file/novikokex.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088de886b1b9---narowiwidedunumov.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/4qqdj64c7fvd89g7kp3bfgafgp/pesinu.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16084f6c2e2227---mimifixipedeguziwevef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+end+a+month+to+month+lease+ontarioPDF link annotation

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