Malicious PDF — malware analysis report

Static analysis result for SHA-256 584fdceb80d239b7…

MALICIOUS

PDF

67.9 KB Created: 2021-09-05 02:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: bdc44fc4c26bcb33effb973b14a7a2cf SHA-1: b75a200aebf665b9ade6886c9582771683fd8d71 SHA-256: 584fdceb80d239b7bef699540268ada892d1243d968a9750006b5b889b05b3e8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of 'utm_term=ipm+pest+control+pdf' in one URL hints at a potential lure, though the document body is heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5231

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://svx.su/ffile/file/81192975542.pdf In PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/nenekumirut.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/64689986039.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/segogogaworugi.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/33643313718.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/gejukukiwa.pdfIn PDF document text
    • http://southeastern61.com/clients/0/07/0748cf78e2268043913ae7c14e09e996/File/51447463822.pdfIn PDF document text
    • https://oceanflowerhotel.com/uploads/image/files/66537772607.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/38371508101.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/5fed8bc3d53b5862134cd542a0af5086/88462516203.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a39d3fd4d6c---76107818045.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/84023659928.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d098f2219---saroterakenabizosizomudi.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/ba20d77991bdd7177749dccc0f6ce8d9/sutuv.pdfIn PDF document text
    • http://praguetransfer.com/files/file/95645276625.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/gjojej10u3n720abp0eh2kset0/7495277346.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/46363186670.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/kevugozitu.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/8dc63190f5ee429efb95addca99d8b23/fijezelepifanopo.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160876c8ca1d10---38710777959.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/75074628394.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c5785dd5a---lerawajabaruxavamuvid.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/3fadef8685ab9b317baa541f4a4e1d36/kajelagejosud.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/85475058179.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=ipm+pest+control+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA4 10476 bytes
SHA-256: 20f19001c91cef0d2c837e582bd923a77da44b210859f30205e18296cc9c6de5
font_01_sfnt_off0000d567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD567 16300 bytes
SHA-256: 88b2a78f9593434936b175179108ad32a36a7a908ef7bbe5d29bc3505cf511a3