Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce3ebaadcdc6c1b…

MALICIOUS

PDF

82.3 KB Created: 2021-09-05 09:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9a00c061a7d8c06497111e6d352c18f0 SHA-1: dd5a37cd5a0a8dd84a4eaff75cf1732551420d8a SHA-256: 6ce3ebaadcdc6c1bd2c6fee9890e4d432851c026bd569a21c71f2b7274bfefc9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting it functions as a link farm. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest the document's purpose is to redirect users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://md-servicios.com/userfiles/file/gasuwik.pdf In PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ef50d92cb---57901560922.pdfIn PDF document text
    • http://agro-partner.com/Image/files/87297690872.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/zifaje.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/p4qv2n85cbhffknib150fggo4d/molivikoxugep.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/gagutafepagofegasi.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ae0c0519e06---8263664353.pdfIn PDF document text
    • http://soncongnghiepjotun.com/media/ftp/file/letefekozozelumewuvudareg.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7868a1abb5---5997171126.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/wapexidu.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/011f8a5f6a5d33a354f811f7b2696662/zatesefitikinuzaniw.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/64895982063.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/ko4b1qshsd0ti6qsr3ubn0un62/sugaz.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/lulobunetes.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca3120a545---mupokupu.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/090c0ad10ebf25506d0d0d6793011601/30928473984.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/b24c69d47425b72da5ed07dd6e275b26/lupobetukenux.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/8020b2cc6bae01b8f350885b69adab25/25375787584.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/rofuvukiwap.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/6f568724b5cf892749d6b06318b30b99/37454554351.pdfIn PDF document text
    • http://sapientgenerator.ru/files/userfiles/files/53645878448.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/42eetcubm44ad7niqolj1p25v2/zanusakipexevefiromunefaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=create+one+pdf+from+multiple+excel+filesPDF link annotation
    • 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_off0000dc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC62 11012 bytes
SHA-256: 2a8eb06c013bc5af3d3a85691d035eeb28cbef4099ed280776cc722242cb4782
font_01_sfnt_off0000f603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF603 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E15 17384 bytes
SHA-256: 3bf320ffbb12ab7383fd20fce523d458c0fd0910006626aae3487e394c292311

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