Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcc16e137daa3eb…

MALICIOUS

PDF

65.1 KB Created: 2021-09-01 14:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1589ea957a12eb6cc0f09ee164dc4970 SHA-1: d9cf6556aa93ae26301beb4d9632da5a433bfabe SHA-256: 2fcc16e137daa3eb2bfbd17de2cd3a56d2c96632735a91b7fcd321eb4426607f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links pointing to compromised WordPress upload directories, indicating a link farm designed to host malicious files. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8306

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://smidgel.ru/uplcv?utm_term=red+mark+on+baby+leg PDF link annotation
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c77487ad30---lubedinixakexikixuvojiw.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086916515cff---wogoxiweruwegatumefu.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-7-2/20210702184700529631.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/r387q07gst7r6544e6j5skt357/5065444158.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/soginafasafibiwevupek.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160908d3658347---lopope.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/45500016709.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/99543166624.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/fa6861d25a42e9e62298f88844243615/35899086524.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/malaw.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/befifaroxukuxotulud.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/rifozewuninisuga.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769378ad7e7---lozizabofokasegurujug.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/71794364855.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/fgadvkjhjei6l748mf77vo4dko/58348499130.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/281dbavtrnsvsa60mgdatn1knf/wujibumifen.pdfIn PDF document text
    • http://islandpointfl.com/userimages/nifonodabafori.pdfIn PDF document text
    • http://chpcentre.com/files/file/12731002716.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2841a2c7c7---92014708935.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076df06242e8---18969116928.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/6d9ec9850b76552989561f06a714fce6/sodotozigiw.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/07a05e40a4d41cc4a5e93981a6e43bb4/famorivamolaregitisatuze.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/38fdf65acda68280c5c2a0e86e2b319e/bigeruwibo.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFA 10624 bytes
SHA-256: 1339bf1091446f1d2bbb95c3bfb36040b5161f91ba362f46db58896411fc8b02

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