Malicious PDF — malware analysis report

Static analysis result for SHA-256 53405e3bea7eab9b…

MALICIOUS

PDF

44.3 KB Created: 2021-06-27 06:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: a97b661ef57cf0283c0cddf2f4842417 SHA-1: 861271326ae8acf8581abe10949c458538ef2ac6 SHA-256: 53405e3bea7eab9b44e288846b8bf88ecdbb3150bfc8620266a1b0f8fba9e22a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5294

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 0 text block(s), carries a click-outward action, and is only 44 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://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160819cc60266b---padolatezomanunobe.pdf In PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5932d97194---41562466714.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/4cd43e24d520aac1b25db9355429e25e/zebizex.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-06-17/images/files/kodutuguvumel.pdfIn PDF document text
    • https://unosms.us/userfiles/file/73323486991.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1970d23d1---4717776462.pdfIn PDF document text
    • http://cepsagibyachtfuels.com/images/photos/xafirapalugevix.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c3dbe4780---32515411833.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/29986948456.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/26066239424.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf15ceb978c---sowatesalerokiwaxifiv.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/ponama.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/nagusowu.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/59f6fb6350dc3c5812b0a0c3f377868e/33251341942.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/tqfk6ek611mfvd19356aqg9633/lelirumexunapezenaxet.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/7722627372.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/9b9426a63c8e8a9eb9e16813f60fc495/96527458402.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/31459655922.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7cba8149141c093966c1cfb0ba71145b/60987555889.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/r3u6baer0rg6sv2to3a4vvq0je/38598898235.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/3cc16bd22eed5e5e7518ac34ca645b8b/madavolerodenabametipugu.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/179d7a4b2fe19146e956bc7d25fa18c6/35372136610.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c667de8c220---gunusidolomewadedi.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1609601a5785bf---kisokemigiw.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701b53dd311---poxuzujutamizonu.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/4b654bee69d6f521152b2f179eb12cb3/20851743601.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/nhnl254r03454oiufr59bgi133/63685025767.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/69c59cd4a8fa5fb75b60275888323a9f/26364432430.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=if+and+if+vbaPDF link annotation