Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fcd2bab3a32078…

MALICIOUS

PDF

85.4 KB Created: 2021-08-09 19:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d56f6b24e5e3dfda9a87125ff25dcbc6 SHA-1: 1ff912477ad8b0d1f5187fc2295605f40fc782b7 SHA-256: 96fcd2bab3a3207827e33c172a308446f85e212e4a5ad2a0f8cc8fa29b32622a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • 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://laborke.ru/uplcv?utm_term=fox+news+today+schedule PDF link annotation
    • https://grouptm2.com/contents//files/8970096098.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/66605654069.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/tp04ll2hi6cj60ceiig2jdj543/dujawuvaxeleteke.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e12b503b8d---25617802777.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e421714bbc---sagizuvutasotoga.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e8c101e76---76805789844.pdfIn PDF document text
    • https://digicpictures.com/downloads/16846010373.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/lubumezedejimumabopedogi.pdfIn PDF document text
    • http://phunggia.biz/userfiles/file/jovutibitowojal.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/c4b08d7c187b46bb0e86548bb4928bff/91562897421.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/50273932737.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/bogarelinisogasajetonav.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609054291493c---duwonenixezovusovagores.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094ac4bd70f2---77585789876.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ddc8c3a6bbe---gevugexejexobutikosib.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/5cc6hcjpcf9qu306b1160jjfma/redekakirotadolisoxowebi.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607182ad706a1---16149504165.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/33017387924.pdfIn PDF document text
    • https://comptables-publics.fr/userfiles/file/52329302850.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/58994232730.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/nuzeridev.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/dd719e2c97fce97053185cd7c447f507/23217366627.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/wonuruwuw.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_off0000ea91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA91 17272 bytes
SHA-256: fbaccc6305eb93c8f3eebb7b513343ca263d16185cd2d01a0ab750286ec90de4
font_01_sfnt_off000117ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AE 10652 bytes
SHA-256: e943018cb1c19915c79b7e26a29c9dc848a432b13638cafd89a2908edc0a92a1
font_02_sfnt_off0001302b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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