Malicious PDF — malware analysis report

Static analysis result for SHA-256 218d772a09103a91…

MALICIOUS

PDF

84.3 KB Created: 2021-07-05 02:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 44c624573c3d9ab5e82a10df75d338a4 SHA-1: 748bf06b9e994d3d8aa3e6c44dda094fefcf2ba5 SHA-256: 218d772a09103a9123f2ccd6f8a7c246263eb10d4d7265f304dd7aea66cbfcd4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It functions as a link farm, containing numerous URLs that likely lead to phishing sites or further malware downloads. The presence of compromised WordPress upload storage links suggests a pattern of leveraging vulnerable websites for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://cructi.ru/uplcv?utm_term=compare+and+contrast+two+paintings+examples PDF link annotation
    • http://bluedevils59.com/clients/862365/File/gokimuloxizo.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/9cc3b974c12b12943a8a3fb6a8101614/weleruzuvutikazagixi.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a4c0a55eddbbc12a2ed84a65f3e0ad8a/rabujimado.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/4f5fc506ae72e61267cc516577c1cdd9/45716185255.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/d5vd6qp692e70283jpnvjopp81/36924812736.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/pipuxixoguxujanitebe.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/dojijapevuna.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/bd639dc084e88ff142ffb1e51f5ee8f2/botezi.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/40601886361.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/06/27/benalamazotumijazul.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/67ejk9b5c6f7epusi4o1bl5j84/40085864232.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/7631622581.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/lr52umjr595h34v3o2n820qf1r/84133969035.pdfIn PDF document text
    • http://atek-ent.com/upload/file/luvogofuluxowosakobiwi.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/xagaxisogidivazetukekego.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/c112ba310677e3813f3cdb80c8be3e44/45922331986.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092a241b7a49---jikimesikubisovomewojaket.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/jurabopevanawoxula.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/d88ba29b3e55d15b7b3747e341107cb2/10842275684.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16099f4cb79fe1---47622705876.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/lha1ifdroi9kd1o2vd2gm1vb94/47050861342.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_off0000e609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE609 17000 bytes
SHA-256: 3b559092c3e8662f01d10729ff167e45cdb4a69154e59c81c15aba2ccd935d15
font_01_sfnt_off0001125b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A72 11076 bytes
SHA-256: 4b3a3becabea57314db7c09c2046e8c5893baaba8a0fada437d0436d41bb762c

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