Malicious PDF — malware analysis report

Static analysis result for SHA-256 953b08280607a54f…

MALICIOUS

PDF

41.4 KB Created: 2021-07-08 09:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 077b4379be134cabf3a6df0a234d7314 SHA-1: eb29e69e7f8f1cb9ed48a1a5a3a22d3a7b08bfdd SHA-256: 953b08280607a54f62abaf93d6dce27f41820258d0fd43c964ca4bf5109dfd9b
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 0.7476

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 41 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://oniceh.ru/uplcv?utm_term=agile+testing+interview+questions+answers+pdf PDF link annotation
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/8998d37bead9cb7cc5c95a532aff9778/51270005515.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722f66526e8---fiveleminogivume.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce262cdb6fc---90680900198.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16090f7fb6a8d6---noxizuwilu.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160b6485e46cf8---fuwexuxetudemo.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gidunodadaf.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/wakekezowedetazeketul.pdfIn PDF document text
    • http://goref.ru/files/file/23282333339.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/79978b49fd8ce68c57d3b664c949208e/tobefezoxutisoxavogaxel.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c15db1cbb04---suxesoxedotanitadero.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/21768732241.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/muxudanija.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210621070324.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/93666117084.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-23/20210623002716421420.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/70087154307.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-3/20210503043421458630.pdfIn PDF document text
    • https://signika.pl/Upload/file/dulopamuzozojepibosofigel.pdfIn PDF document text
    • http://renovator.cz/files/file/fekebapifagugivegudop.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/zulukivowupu.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/d0f6045acaf4c674dc42ee1f9025f0b1/82431835682.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/72798965799.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/94158528717.pdfIn PDF document text
    • http://clubchic.lv/c/i/files/79111872669.pdfIn PDF document text

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