Malicious PDF — malware analysis report

Static analysis result for SHA-256 7580fc1d78c840bc…

MALICIOUS

PDF

47.7 KB Created: 2021-06-06 17:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 44ec23fabc7c1913ee78bf60040bac3d SHA-1: ed642d709af2dd1f9c0af61e1a7489521da2d5f3 SHA-256: 7580fc1d78c840bc89bc9da2969ff407e0d8b369d94c932e631da8c976e1acf5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ClamAV and an ML classifier, and it contains numerous links to compromised WordPress upload directories. The document body, though heavily obfuscated, suggests a lure related to 'Acca certificate in ifrs study material', indicating a phishing or scam attempt. The presence of external URIs and compromised CMS upload links points to the distribution of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9337

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 https://huntic.ru/uplcv?utm_term=acca+certificate+in+ifrs+study+material PDF link annotation
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a6986caf0be---90757329420.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16087ba99a84d7---rakuw.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/dizaxawojunubuwez.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/sjoeuqt22shaesv9ie5jubt73i/roxulolukitisas.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729feacf221---kegovamofosuwez.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ca610d869---besobuwipugobikujasijoven.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/61db3f780133b4873b9f2c96a16bef9c/sobuv.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160abe8a7907f3---koririlowiluwajab.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160984b656d756---16278922204.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/85208106994.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160940fa502ac8---zotukejofe.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e422a82095---57790493687.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/0cc84f82361e05ea2bada00e7c9ff042/83050618880.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/rizazan.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/zukukisepitejobika.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073eadba7e30---zalejifub.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609683c9d2221---35888907687.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/c0751b764fb8adb5bcf901c008f3d332/42313806494.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609973e393e60---20534537666.pdfIn PDF document text

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