Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3b4e4d5265b918…

MALICIOUS

PDF

59.7 KB Created: 2021-07-18 12:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 82950263ff9a73ca1a86f5973d084378 SHA-1: 922fb168c54128ff5938598207ab26d4aa8c8842 SHA-256: ec3b4e4d5265b91854fadfb7968e1dfe549f0760ad9859c624f88d4138bb31a9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress upload storage locations. The heuristic firings indicate this is a link farm designed to direct users to potentially malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6988

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 https://alkalacarservice.com/public_html/userfiles/file/81609122399.pdf In PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/xedunixubib.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608551c46bbde---79553564469.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/c0c3f08c57bbe3a4eeb5b461e910ebf4/42858920763.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name//files/zejofij.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813907c56f3---wofis.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/32240p13tjl1scqkpvtd6kaa8p/nurajasavadepadulisa.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160812e7b36944---xejuvavodopebetatoxozewa.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210708074951.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/1e725b649ed57ca9c7dca54595074942/31227821625.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16078ca9d51256---71974137960.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/22951723592.pdfIn PDF document text
    • http://metapolar.hu/tmp/xupukebinuguwafadami.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/30809137988.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/situwinime.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/17gfntu99fmlqpfflg8koi4mrg/wagepakagedavexexum.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a493505373c---zetisedapojixok.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b456750af9c---92937306429.pdfIn PDF document text
    • http://charivne.info/images/file/jiditotidezive.pdfIn PDF document text
    • http://thefarmatarapahoecounty.com/userimages/21944780290.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/0d7bc7106bc9eca088617989a964095c/xuwodumixuxakafonefomab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=icd+10+code+for+redundant+colonPDF link annotation

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