Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d447a59615d8103…

MALICIOUS

PDF

131.5 KB Created: 2021-08-09 17:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e06173d5a878cdf6b3fb5a82373bc92c SHA-1: 2bf6b304a2a80fbb65069e6180a1dfd593a6c503 SHA-256: 9d447a59615d8103e01c093dfbfa80a7f12daa12d8153c029eda7cce24529579
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many pointing to compromised CMS upload storage, suggesting a link farm designed to redirect users to malicious sites. The file's structure and numerous external links are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://ketchas.ru/uplcv?utm_term=mccurdy+%28family+and+kinship+in+village+india%29+argues+that+arranged+marriages PDF link annotation
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf7d1a759e---vetajikunipa.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16099bfe37e180---wajegudisesofoni.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161103bb4504dc---roduxazifapuxozipo.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/panujizomexalezuxojexeriz.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/926c28b162b4db7e70bcaf32728a4d79/diselolugivoni.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b59c5c0705---15486163355.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/xezuwasorinijaga.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/samaxuvegefa.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c8522f58f---5187560239.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/17893976755.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864cafbc19f---56276695616.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/98203363092.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160796038d6c54---62964657515.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/111728991.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/mikufazisudurosojawuz.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/83193512458.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/68614680218.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210728094518.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/38f9856694e814f48b9eb064a84eb32a/82771447266.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b34d97077bc---xomuparibawizojugufosuzip.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/24754670714.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71855082ee---laralozizi.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096eb7399f78---76127398566.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/gutawexukimoxasutixunopir.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/e85cf4818a050ff6528928f15b124f6a/kikojesoxufafegekexi.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/72169515892.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_off00019e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E9E 11468 bytes
SHA-256: 67c7a38d18eec77962062e27f643c81347785d912365f4ae29d1b23bde259411
font_01_sfnt_off0001b981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B981 17316 bytes
SHA-256: f201eb1602134f3e027974e35b982e4bf96641139f7e9e5cc609fb3a2938d8c8
font_02_sfnt_off0001e67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E67D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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