Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e37ff22072d881…

MALICIOUS

PDF

59.5 KB Created: 2021-07-02 01:36:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cb92d65cd0d4ab7c2889a490a7ea3a99 SHA-1: 4de6bdbfa212fde16fc564997b19ab135f89e219 SHA-256: f0e37ff22072d881fb2db620e7afc79df1fd69097cdfd1e754d7572c265c9e27
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are presented as a link farm to disguise their true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6012

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=star+wars+audio+books+free+download+mp3 PDF link annotation
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/ab6b4c2fc189fd01f3dd1faf2d1d090b/75159227696.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/fafunalebiwifupojixa.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/a8666e1ff91a8e7e347e5046650c7328/wakiwoko.pdfIn PDF document text
    • https://areicon.com/images/file/43128485670.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/37821893054.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/pejigudazarek.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/13914178511.pdfIn PDF document text
    • http://accronline.com/userfiles/file/mexatixawujekuxovulilu.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/nj6c276698n03smm9g2mldl5lq/texafamuwiminow.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608f39b0992fa---61274396816.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160883896c12ca---ropuz.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/jogalafazezukudiku.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/635c563a33a9964d0bd408171daf2700/42992304215.pdfIn PDF document text
    • https://mimpishiodua.com/contents//files/nokifuk.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/kodekumoguwo.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/rijij.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/37874964143.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/rabawi.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/norilufow.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606de2eb3b034---95763542596.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/popevizevizuwepapebo.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/a0eb2783a0d266142e0df2700b8318af/sotov.pdfIn PDF document text

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