Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8563a5981800581…

MALICIOUS

PDF

80.0 KB Created: 2021-07-26 23:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: be4591c4451510ad0d84b6f103069a4d SHA-1: 82a24c07cb3a0a2d470d5ef85b05012be3c76531 SHA-256: a8563a5981800581e038bbcf1e2c7feef815de4b9f0643c74419b38c8a48feae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute traffic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7855

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://janjoling.com/public/ckfinder/userfiles/files/rokumeni.pdf In PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07059a88b2---befezikovop.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607589c87e2c9---zulibexokinu.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/21628031269.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2104858ee---15702470622.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/pozepirosegul.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/48024938481.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/4d1f34c8fbdf8280722088f8c88ac3a8/89984975469.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f8001c62d---megixuxonevadul.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f36b55cc9b7---25880771781.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/sidopojexasom.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/remagedipewurubolaxozo.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41dbd118dc---66283114638.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfdc54a89e---27798202537.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/90139978135.pdfIn PDF document text
    • http://atmaircenter.com/lb/userfiles/files/83655049400.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/p4ue0bqnhu3utu0e38j9t21kq5/xuvopevemezolagevunu.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/widowe.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/29577440576.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/sufiwizepixoba.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/wowevugerinamogojifasi.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/nazuwalener.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16078f20766e07---gewizemejobipuzan.pdfIn PDF document text
    • http://arslanemlak.come/file/63992402755.pdfIn PDF document text
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/24643502649.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/93603116359.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=what+is+interview+methodologyPDF link annotation

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