Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff701bb1a7774f3…

MALICIOUS

PDF

85.3 KB Created: 2021-06-28 16:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b2eb1f30ef12ac8a071f23ad5d68695d SHA-1: 28cf517438012194a18c5f853f501f12c9cf7f73 SHA-256: 1ff701bb1a7774f3bd03f579205abd024c9abef4bce1b564042f2b85a697c209
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://synerhu.ru/uplcv?utm_term=capital+gains+non+resident PDF link annotation
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ca033d7155a---72625234911.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/gatiripirez.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/52922815825.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/66408849421.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077ce947c191---bukagixemaxoxejo.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f16f0f369---pilenogojavexujeziwe.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/97621407096.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca678ca14b---57880784658.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/3424ce3f6ba4b7b35b6896d7b07f8a0c/tagevosuleduxufa.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e82b334222---waserabebifokotad.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf57b7ab666---26409175403.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/92036090530.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae580804a62---38256399240.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/guxagakozulezefulo.pdfIn PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078863640f37---87293687876.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/latexatunibi.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16079de733a309---71721875689.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/20796794772.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/23945090098.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607c93e2dcd2b---lexubipifedikitamepora.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/13625675666.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/fejinezonizulaja.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_off0000ea34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 10596 bytes
SHA-256: 1ec13f4a8754ac8b12d61ae4f0d4151814b3e5cbfea5e91a42de0e01b2b7cd7e
font_02_sfnt_off00011a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A69 17364 bytes
SHA-256: c1e15b33acb8ac2775976b4ba5fd9512a3b7bd758c0b614bb2c5fa23911f8268

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