Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10f30e2ca3289f1…

MALICIOUS

PDF

90.1 KB Created: 2021-06-23 04:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 68a03107af3f7324a6d9243c9c05abeb SHA-1: 79f065d2be67b2ac36e5699990e126d5f539ebd8 SHA-256: f10f30e2ca3289f1b78ea588d69189e04737dbeab2f1d8d6068aa5d71ba9e75e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://drafthe.ru/uplcv?utm_term=ias+mains+answer+sheet PDF link annotation
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/1e74df190307f18a6f249e3d954c0adf/74468993850.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/rafebodivaloxa.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608b63c76a21c---12978761371.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863ce4de2c7---3606049887.pdfIn PDF document text
    • http://kelvista.lt/images/files/60925454462.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a020dfe7ab7---ravomobilubirexopipisese.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/3895484903.pdfIn PDF document text
    • http://planbmedia.hu/files/48928320951.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/nedaxuzanukefojabuxuw.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/fawenosomadazefokuw.pdfIn PDF document text
    • https://digireg.cz/upload/18935578559.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/s87gjemokdfn387094erk0jf9j/zufudamovepizug.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/63923472460.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/goxeref.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9daf70c32---54729280070.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/65448909230.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB8 4924 bytes
SHA-256: 6ed4b9ceef8d5f64b6c67bb1470b1093d41692f3d2f173c90baad8ecd9ad4f0c
font_01_sfnt_off00010b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B58 11292 bytes
SHA-256: 676f781153ae3138a9af65b9ec91f433295ce7ffa4a785bb49cef744a2687076
font_02_sfnt_off000131e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E7 13088 bytes
SHA-256: eca635dfe760dc6b35859f164b5ff8fe9d56d8feeb5bdc6a5cf73047ba94e84e

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