Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d348e03fb6d0de…

MALICIOUS

PDF

60.7 KB Created: 2021-07-18 05:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a610afcde4e4c78383aeb19898e6a7fd SHA-1: 773a7c16dead2396f857ccbad20cb9c957253ced SHA-256: b1d348e03fb6d0de339ec479763ccca3ee3665e39c4e58803dfdd5c4d0d52c2a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further support its malicious nature. While no scripts were explicitly extracted, the structure suggests it may leverage embedded JavaScript for malicious redirection or payload delivery.

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://cissud.com/uploads/ck_editor/files/19009807330.pdf In PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a42725279d1---nibipuruse.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/files/gurajifepit.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/i0dhhugvc1ilkignkqol1nu5sl/77976238644.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/99479580671.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/pujeribabakonod.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940f492ca3d---77155502946.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607311ab6a6be---44036115824.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/60218450422.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/bhmb3gsjc25bu36g8t6jegu431/6053876176.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d44d0aaae39---vawukezexalozi.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/b3lhetqbeq79588rj3tas3kma6/18397089405.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/bepafojutisofajadina.pdfIn PDF document text
    • http://viewcs.com/partner/upload/dextfile/damejonevigid.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/47592561943.pdfIn PDF document text
    • http://palami.by/images/file/xomemusuxo.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/3908221924.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/7208659d7455a715987014800a247c58/bifarupaleruz.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/luviwiwagugoti.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1911fc1345---45200935504.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bbafce088---galumimixuwidoxenatag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=nrc+beef+cattle+2016+free+downloadPDF link annotation

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