Malicious PDF — malware analysis report

Static analysis result for SHA-256 4102ac32fabc5a8f…

MALICIOUS

PDF

76.2 KB Created: 2021-08-03 12:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6f9fd62159ef2a729ce1fb29a664ddd3 SHA-1: 3628dab352c64c9b1f0b1c73ef799f723a8c7ad5 SHA-256: 4102ac32fabc5a8f45d74aa925704069dce6a0d403b77cee5ecd8f2c11615e78
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised WordPress upload directories. This structure suggests the document is designed to act as a link farm, potentially for phishing or distributing further malware. The ClamAV detection as 'Pdf.Phishing.Trojan' reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9548

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/clblgkbtfaukq6vpkutpe4c3q2/67657289004.pdf In PDF document text
    • https://curewelldiabetes.com/userfiles/file/lezidokopakufapenow.pdfIn PDF document text
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/5821047732.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/81303067359.pdfIn PDF document text
    • https://babamore.com/upload/ckfinder_temp/files/20210625140554.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/89883646926.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16104293db4db4---wadageperimo.pdfIn PDF document text
    • http://sassyissy.com/survey/userfiles/files/66423257714.pdfIn PDF document text
    • https://freebcard.com/ckfinder/userfiles/files/kaxixa.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/wuseruvezeluze.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/8vo3ucrl5qenetuo4t4lbsqrru/pugevobafex.pdfIn PDF document text
    • http://valeneighbors.com/userimages/46126189762.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16076fd2555dba---79452113271.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd14d8cfc6---52762965508.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160814b75d8a3c---40884566686.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/27c33c5a0344dd59c1b8dfd3e33787d9/wimiralegajilunexudobag.pdfIn PDF document text
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/67262977937.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/0d0a0beb1943e25980f65428168d4c50/gikalirikopexisotolaxa.pdfIn PDF document text
    • http://spoilersmensgolfclub.com/clients/865201/File/nusivemexuwesobupelale.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/molakasoxatagezivugamemoj.pdfIn PDF document text
    • http://kahasat.cz/data/file/beropuxavamefomagoxigusok.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/jometebabugo.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/xekokanalerenekaxizimewun.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d40d145c8c---30109754643.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/75ba208743da1c1d1704207d83d94510/fesoviduzuxogodu.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/94535095565.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+use+a+wagner+pro+duty+power+painterPDF link annotation

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