Malicious PDF — malware analysis report

Static analysis result for SHA-256 933442683787fb5d…

MALICIOUS

PDF

70.8 KB Created: 2021-06-01 16:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0308c6e817e81d6ca195b6a2ef70da5d SHA-1: 446f3e11bf1f2dc7bc5e21c87157cbdb69ecdc7d SHA-256: 933442683787fb5dbcba462662832448ed5ee03008b53d9d3ec5773c09540060
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the links strongly suggest this document is used to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9572

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 https://irlanc.ru/uplcv?utm_term=actividad+integradora+2+modulo+4+semana+1
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/o5bdtnfr7ku9m6ulartjlefdi1/7491889676.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9fd2f39b1---11524275345.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086bdd5072d3---rimijudavutuporulewoje.pdf
    • http://afghansolar.com/userfiles/file/36793813161.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084aae87cf1f---75010368390.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f81d2e5ec---73410777193.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160979eba0bea3---bedokazusegarubavo.pdf
    • https://adepotcustom.com/UploadFiles/file/20210520204451125.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/9ebd3a803ee10344916e63107c4b416c/14510088823.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3bddc0f28---xugosofon.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/45dd4f6553147dcd8171c2aa334ea46b/dakexubitozalofatafono.pdf
    • http://gemculture.com/userfiles/file/87171132968.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/do7ernkaf8sdi1rkbsjihpgs77/89960773635.pdf
    • http://planetamama.ru/files/file/nazebasis.pdf
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/selijufenibivizalekewop.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087f51f30d02---dapusugelurevijiguzapav.pdf

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