Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f34c977d9ed7a9…

MALICIOUS

PDF

39.7 KB Created: 2021-07-17 01:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 397b7f35fb6cc8d09af64e981659d7ce SHA-1: 748814d3699c4fa176fcc756845ad2252114b6b1 SHA-256: 84f34c977d9ed7a9d90e06afc68279a917efa262bccdc6867213bba5e568cbab
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a phishing lure, utilizing an image-based interface with numerous embedded links. The links point to various external domains, many of which appear to be compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites or download further payloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8579

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://point-grey-1970-grads.com/clients/f/fe/fe7686cf254963525dc0bd811951f15e/File/guxij.pdf In PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/fb81bb041ca4f5968e5bc39b244b6555/mogokor.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/47507938078.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/857c7012ca313b277f4900f771cd805d/giseburewojefuwisugibip.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/61114725832.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/vegem.pdfIn PDF document text
    • http://tianfonmm.com/d/files/bumumijavodikapa.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/zirukowedikozenozurajogo.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/11952357480.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b14779ba777---31484008275.pdfIn PDF document text
    • http://rafaelokazakov.com/file/65305561102.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/b03df7bbf7f087490b97fcad99746e94/sobupix.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/48vft4h5anomjf4nrq4f0d8vc4/bonajafukoxirafinimabip.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/51270493216.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609401df9ed52---viduvivikolevolizifive.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85020569209.pdfIn PDF document text
    • http://penney1970.com/clients/7/74/747debde904cce1d9d58e62e9103e361/File/72228439055.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9aeb1ee9bIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=number+line+to+30+interactivePDF link annotation

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