Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf49a9c756190671…

MALICIOUS

PDF

70.3 KB Created: 2021-09-22 22:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 4141d871c9a6f283fc1844d198107b0a SHA-1: d397822a6e8f3385eb21817edf2573081994cc3c SHA-256: bf49a9c75619067121cc5f15d64bb858b3edc75bf27230544dcc46ea98d32ac8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS upload storage or are hosted on disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The primary attack pattern observed is the use of malicious links within a document to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3264

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://ji-tien.com/userfiles/file/zonawadutudimomovifefuwev.pdf In PDF document text
    • http://gammatradings.com/userfiles/file/raranupexemasapolubegob.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/liragawotebi.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/36087123234.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/20037438328.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/47093078935.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/74709649367.pdfIn PDF document text
    • https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/kaferisar.pdfIn PDF document text
    • http://licausi.it/userfiles/files/28182917773.pdfIn PDF document text
    • http://sintjorisparochie.nl/userfiles/file/84118340999.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/93608126458.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/terepo.pdfIn PDF document text
    • https://jjpremiers.com/files/6274013129.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2ffc4e697d74a8b8c5038e4797f3a839/94192605902.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/52087357436.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614106d38be05---jokivowokuxaxiberi.pdfIn PDF document text
    • http://xn--80aafkatcapceshpicpg3h.xn--p1ai/pict/file/noganadoza.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/vanedugivofunafujifel.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/636828235a4c41069ea8980206ebf601/95361934936.pdfIn PDF document text
    • http://okna-stv.ru/userfiles/files/vozujotesiw.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/4b88f199cf5572db5691671608ce8da3/rigajatofinemisutigitawil.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/sugivekososopin.pdfIn PDF document text
    • http://mextro.de/upload/files/weragovikojeduzakofosire.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/20114180708.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/70270738004.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/xadebujenivomorura.pdfIn PDF document text
    • https://calprin.com/ckfinder/userfiles/files/18335101039.pdfIn PDF document text
    • http://kccmaul.com/files/files/bepajovanek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=policewala+gunda+2PDF link annotation

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