Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1badd7e73b67ba…

MALICIOUS

PDF

58.6 KB Created: 2021-07-02 16:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bac7a374b46777105fe02503f3b59f9d SHA-1: 680f45f4b08b06e158f1f3947c0525ca64940c1f SHA-256: bf1badd7e73b67baaada82d288a30ff05cc654002f249b69c42cf2b7e3b72ef4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution attempt. The heuristics reveal it functions as a link farm, with many embedded URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating the use of disposable hosting and compromised CMS uploads for hosting the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5356

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://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/9ecbbc2d8b417b18170efe47f51ce237/xavowojo.pdf In PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/5eab17b9994e2b5d78c89cf073034462/duxewuvixijubawubajaz.pdfIn PDF document text
    • http://goergenpainting.com/clients/0/0d/0d1038892961fdbf96b6a8e7e8daca8f/File/dadagobajinu.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/fozorisuzanami.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/52a4e64bb3dcf69652ff0cb08e00edc2/12650461784.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b1f913c7c---tilelap.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/67466231592.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/9292950232.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a76b4fd9539---nulaxifebu.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/kigajefopudokufasobaxu.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b090616550---47694184499.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7543aeaca3---pemujij.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/5ffa8214d78b4e99f48437386c15d8a8/suvoxuzatisekubowekozezij.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/1oh62g7ibgs60v1rks2o8sluqh/budidarewevuwuferenor.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/30313976943.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/lozixena.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/b1568480f865415e91101e633c7ef5b8/54948876975.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075038c45a22---69679582689.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160de2ecbaeea2---27267126811.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/86130360017.pdfIn PDF document text
    • http://swingdesignhk.com/userfiles/juvomezuvusiwemovilidenu.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/7fsl743fk8bj1pbh26geg7ivmu/44825027471.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de42ef305c4---24869605157.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/74822288164.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=emotions+stored+in+body+partsPDF link annotation

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