Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d5da3be3b45ccd…

MALICIOUS

PDF

81.3 KB Created: 2021-09-20 14:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 0193bb0cf7d8ddf0e5cc0ff64a159176 SHA-1: 5cfdbff7971d83e67431184caeb82e7f2b6b3d27 SHA-256: c0d5da3be3b45ccd5daa0658d83af03c4b5cff0323407e2d3b88922640801cac
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and SE_CALLBACK_LURE heuristics further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://queure.ru/uplcv?utm_term=chak+de+india+watch+online PDF link annotation
    • https://qfse.co/images/uploaded_files/ckfinder/files/1630692745_2e594b3d04.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/56832129139.pdfIn PDF document text
    • http://spartapr.com/images/upload/file/47725382498.pdfIn PDF document text
    • http://otczenacts.com/media/files/9214284188.pdfIn PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/78232726191.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/38574962471.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/94530848969.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/25733738775.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/18214093122.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132d0cc8e572---69990880440.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/42883756916.pdfIn PDF document text
    • https://kralpin.com/calisma2/files/uploads/43787944911.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/vezolurugoziwet.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/59465958547.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/f3663883ba2aa9f5960452a51a328464/ralutifajatajipa.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210910125932.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16138e4cba1318---60971407623.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/66161340517.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/c87ceff3451e14d016c2eecb2adf962f/8415640264.pdfIn PDF document text
    • https://elmawadah.com/userfiles/file/furorujererubuvuderubu.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/pukux.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/gusibamatunipefazipisose.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/71774402977.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/vupetejafo.pdfIn PDF document text
    • https://novsport.com/content/File/41700441414.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9B 17248 bytes
SHA-256: 10c9a14e517903514ffad72b01d7d224f7775a6ace31764763d4d33b3ca10f40
font_01_sfnt_off000107fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FA 10408 bytes
SHA-256: 058c53db2448a2288faac1a7e6d144262ed9ea09439fb7134a257602127ec222
font_02_sfnt_off00011f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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