Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b6fc89f77005d0…

MALICIOUS

PDF

57.0 KB Created: 2021-05-23 21:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53acfa3ae8f132ba28d5759a3e96de2c SHA-1: b17d4c61b2a75095fe1d643bd209c67a50b67219 SHA-256: 17b6fc89f77005d04f58ec8a91545f40d63515b428c3542dd29972b2c64cc0f6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to external websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the 'link farm' heuristic suggest the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://philabc.ru/uplcv?utm_term=how+to+activate+uan+without+pf+number
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081941b30e38---85680042330.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e9381dff7---71633011630.pdf
    • https://accuratesearch.com/userfiles/file/21768863879.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/p02nopp7kqrb0dltubvpkfoqnf/kujilojut.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/4110412075732dbd72c74d9362a18996/nixeretuleleso.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081914a41965---damuxezef.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a527f007edb---rapiwemitiwapunizez.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/b9e17bf34f426f2b6a54fbba58320fa2/84275493903.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/102eba3f684ba9ebd294f42ae5612a9e/vegaxozorafo.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608bee57c6211---zekovobemunesijejixex.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/40a079aa8ec3a9ed2a5f7362946909c0/munek.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/nbpahkknteul3jmdsnnougg6bl/vusozifujubub.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/qnfcgrfn724lbdqt2kc5ekmu28/21578019459.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/a39dcc788ae5f66ca34449b4e125ee17/tupegabu.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fd766331f---22236381865.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/27c1649d52783372c4c72689e5a81f01/25978847240.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772b97b8c65---xivajibekeb.pdf

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