Malicious PDF — malware analysis report

Static analysis result for SHA-256 40504111a58a92e6…

MALICIOUS

PDF

69.2 KB Created: 2021-09-06 05:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c4b04006064a66d1456f90ab7801421e SHA-1: 52c57862d1b086af9f51d6b66b1b1669e56df05e SHA-256: 40504111a58a92e60d745fb347bc66c686d538e85a5cdc17397ab57f04d98027
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms, suggesting a phishing or malicious redirection attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The document's structure as a link farm is indicative of an attempt to lure users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4729

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://songhong-thudo.com/img/files/65949253256.pdf In PDF document text
    • http://studiomalpocher.it/userfiles/files/mizevup.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/weburuvevagadofiro.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843115532b8---73901695984.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1611608ecd2ae0---wugizolomini.pdfIn PDF document text
    • http://graczeonline.pl/userfiles/file/81890220875.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ec0b93c00---xuxosuwi.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/89710704959.pdfIn PDF document text
    • http://library.nesdb.go.th/ic/admin/ckfinder/userfiles/files/widepojenipoxanav.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/53573059407.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc435bd7a9---20068827368.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/f2b5f98886420371a3a72fc56998507f/pedepuwebuvotipokozeb.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/jilutiwasebasedodubatuj.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160955a74bfc3c---44151864963.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/2fd3289ad26e697b383eb326de587095/morewazis.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/netujexa.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/83552411360.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/537bb6384c1efef35b1bf79201ce56f0/refenevanedixudilobu.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/33203170868.pdfIn PDF document text
    • http://change4best.ru/upload/file/xozikifasizefavi.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/11036139914.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/judavaputokoripujelexuw.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb591ef490---27545962713.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/1777037349.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=tillage+types+pdfPDF link annotation

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