Malicious PDF — malware analysis report

Static analysis result for SHA-256 99fe9451107ef171…

MALICIOUS

PDF

62.5 KB Created: 2021-07-19 17:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f611ab4a2716ce67bcf03afcfc49e90b SHA-1: 4c5008241291c23f02ac305677b9d63b920bd422 SHA-256: 99fe9451107ef17147e27792ce9f25fb4eeedfe90b9582449aa59162b2ca56d2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress installations. This suggests a phishing or redirection scheme designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3485

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://asiavent.com/UserFiles/file///nanasali.pdf In PDF document text
    • http://agendaalzheimer.org/files/galeria/files/69749344683.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe3e741ea3---25435616056.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/da48a92093522ec1388283e2f5908214/nalotawinusufidefute.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160721db26fa9d---junuv.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/a644bcdea0d0cad2434f01154705d7d8/zotegesomoxodiribimez.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/16789428880.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a4551de6ee7---72741955178.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/tosexamebap.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093faaa16a88---linixabaresabomo.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/7cf555efc3018849914d6a4e9af34a6a/18174636683.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b8535c941---sutovunedesitozek.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f4444eb2897---rovofemajubazapov.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a296be0e850---80897585167.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db8d27a0aac---19386841616.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/13655784637.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/31693329641.pdfIn PDF document text
    • http://naturallymine-chicago.com/clients/867610/File/20362576496.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/1f3b9c080f78197f11183ab775d1131c/mosawo.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/0c9aa3a7a5b2a22b1a18a1a0be8e9431/99585193598.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4f575d74f---57319897281.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/90936800352.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/46272572908.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9ce97b1d3---36195144403.pdfIn PDF document text
    • http://compsult.net/userfiles/file/29518674832.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=neutralization+is+an+example+of+what+reactionPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4f10307f5---xowaxajexewobifutal.pdfIn PDF document text

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