Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ef56585a1297d9…

MALICIOUS

PDF

60.9 KB Created: 2021-07-13 06:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8f4b8b9f1cd0f83a37764011fc997290 SHA-1: 1a3c7d7da199f22df61b98f6903eca14cfd978bc SHA-256: 18ef56585a1297d9c744eef8da9a851dbf6bf2083553f6bee9a5c8fcca08ef67
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and ML classifiers, and exhibits characteristics of a link farm hosted on potentially compromised CMS uploads. Multiple URLs point to PDF files hosted on various domains, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to facilitate access to external malicious resources, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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 http://psychoterapia-przemysl.net/img/userfiles/file/jefevazagu.pdf In PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acdbd83e5f4---73537099788.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e040a03c2c---7412697447.pdfIn PDF document text
    • http://jwnorthclassof70reunion.com/clients/c/c6/c6167e942b76adab5863fbee8ae727a7/File/64029793380.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbad771f42---10412187487.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093455aa2eb7---boluwewagakagize.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077f764cc191---21812975466.pdfIn PDF document text
    • http://stylekd.ru/files/nemawarekenovumedimogavoj.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/58117221902.pdfIn PDF document text
    • http://xinyuemu.net/assets/202106/files/20210612054612956123.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/nejukugutedugafizibi.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791fef34485---zejiwizelidolikowojivubew.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/44555209323.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/ctu71063gp93u11nf02agjirn7/27803270392.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/ganirinogeburawej.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730d5b1773b---75165098733.pdfIn PDF document text
    • http://advicetao.eu/pictures/file/82590454063.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/403a47768f53d3a995811032e4a36dd0/38665835651.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/78700883022.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/65010913482.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/zanobaluselam.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/eab3989b016f7d62f0b96853260ee72d/vodikotefa.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/1212cd446af6ac377d48479613b7052c/pogojajelagovimaf.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/tenagodiwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=4.6+kg+in+poundsPDF link annotation

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