Malicious PDF — malware analysis report

Static analysis result for SHA-256 807557aa5b7f29b2…

MALICIOUS

PDF

56.8 KB Created: 2021-09-11 17:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f97cc5627ca57a88736261c674121757 SHA-1: 0ccb0e03b1dd57f817920b23b4718d9f571ffcf2 SHA-256: 807557aa5b7f29b20db427403fbe39d6f108f74c4ab6b904dcfff46d852085d6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS uploads or disposable domains. The presence of numerous links suggests an attempt to lure users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9142

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://keemunblacktea.cn/uploads/file/041936027920.pdf In PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/161365425591ef---duxebusekavodujurutanug.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/pawirisul.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/49048020330.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/rizopesoxe.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139a16704013---66775933965.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/57hoi6kbf78fbfs1pvu74flvm7/1094171003.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gidusowonifadi.pdfIn PDF document text
    • https://sona3elkhair.com/userfiles/file/dexetezinonifagudopeg.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/23631321438.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/99090044316.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/vufikovewub.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c686805d46---xamepisovufiwesumibolofo.pdfIn PDF document text
    • http://budropol.de/Upload/file/44009169943.pdfIn PDF document text
    • http://xn--80aafjbawrcdgsodbdciig4a5v.xn--p1ai/pict/file/pemakozoxok.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/bawijiji.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/tenis.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16134154342aee---poxidet.pdfIn PDF document text
    • http://rockefellersgold.hu/editor_up/74772101841.pdfIn PDF document text
    • http://shrlie.com/upload_fck/file/2021-9-6/20210906080029818074.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/53365508530.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/cbdd7d76692078df1a3ed80b95075e94/bemerorirujimezowifag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=play+store+laptop+app+download+and+installPDF link annotation

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