Malicious PDF — malware analysis report

Static analysis result for SHA-256 f621242f4a8cd0e8…

MALICIOUS

PDF

45.8 KB Created: 2021-09-05 11:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 55b80ecbf0433e216189045e87dc1f6e SHA-1: 596def3c611086be8ba22fe98f74d998abef420e SHA-256: f621242f4a8cd0e860e2d8d92da34674e74a16c78033d184fd05996b57366512
154 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to potentially compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to external, potentially malicious, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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 http://santabruna.cl/upload/file/34878455655.pdf In PDF document text
    • https://emauto.lv/index/images/up/file/relufamumuve.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f1f1b8f1f---xusifevovinizejireruf.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/winujixufeg.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/ramofovisitude.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/35388559389.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/butedalozabewipuxodef.pdfIn PDF document text
    • https://equinox-e.com/upload/files/15756558960.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/niweputigefelifidizud.pdfIn PDF document text
    • https://upbfassadenbau.com/upload/file/17652374639.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/70695993880.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/52655468683.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dedb791ebc---zujotogifitexafuwif.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ec4d588aa8---jomububinamebusilo.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebef586b52---85451205830.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d559c3f310c---28151296628.pdfIn PDF document text
    • http://nkcophs50threunion.com/clients/0/01/014062e559e26c1cf0711bcec4e573ae/File/62400771601.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/24050d2daa25ece5b1a6c392b956056e/10592120448.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cf0ba6222f9---71028662677.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/88176258819.pdfIn PDF document text
    • http://painttechvina.com/webroot/img/files/89594273524.pdfIn PDF document text
    • http://edwindijk.nl/home/edijk/domains/edwindijk.nl/public_html/uploads/file/zojoziturob.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/npqsm0obk7ogak2q0rmd3sc0d7/batonegitosofodan.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/3712457424.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=excelvan+digital+calendar+day+clock+manualPDF link annotation

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