Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7297e169ad71d7…

MALICIOUS

PDF

84.9 KB Created: 2021-09-17 17:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 223215c01b028d7d28034779427b7e92 SHA-1: 57ddcbe037b2b8c95f8158cbd644c6e2087c5cd4 SHA-256: 5d7297e169ad71d7905b8072bd57634f095b59d5b987e49dde28c5206898fc80
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs that form a link farm, directing users to potentially compromised websites. The presence of these links suggests an attempt to lure users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ketchas.ru/uplcv?utm_term=vmos+android+5.0 PDF link annotation
    • http://laiyi-art.com/userfiles/file/buzoxagelirufanaguvoxo.pdfIn PDF document text
    • https://nbc.com.vn/ckfinder/userfiles/files/manubakowizijesa.pdfIn PDF document text
    • http://vuadiemtayninh.com/hinhanh_fckeditor/file/7610132432.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/d54896d5b89c82befb71f2989060436b/fuxawukep.pdfIn PDF document text
    • http://xn--80aap0abfiql8h.xn--p1ai/admin/ckfinder/userfiles/files/sobujotalivovi.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614442f891f14---vataxuzuribogofa.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/85391882329.pdfIn PDF document text
    • https://arendic.cl/files/datulonunadazibov.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/gemumifulikuboxobudixowed.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/mufodomozabi.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/66724931912.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612feabd8f756---pinuzisul.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///67839818732.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613658a3547de---tabofegaxizajizibeve.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/084253186b3a1ed4fa0fdf97064d9159/depikuluxuvax.pdfIn PDF document text
    • http://arenda-v-novosibirske.ru/ckfinder/userfiles/files/feligexemenerulamu.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/zajiwidemaputogonav.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/najifuxogemigiporerak.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/tozawagufed.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/34898747173.pdfIn PDF document text
    • http://kbfrutos.sk/images/_file/74559986033.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/60636275259.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_off0000ea10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10227 10424 bytes
SHA-256: bb8c9b0c8af9e03624210c2703a371601a9b4e70d899e04c1b9bc2fd1f350c3e
font_02_sfnt_off000119b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B8 17296 bytes
SHA-256: a4bc8f03a99e59f2121f9b0ae2cdc062e6e8cb2242492c69a2ae7386b4abbffd

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