Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d54c499ff90c2d…

MALICIOUS

PDF

88.4 KB Created: 2021-06-30 02:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3cb95f0a731327a63b51613c27fe302b SHA-1: 5a55aa7fa079dbf18497411103fdb9ea9fe942d0 SHA-256: c6d54c499ff90c2d9a5141aee82f9fcb03dcac7dec4d63830cc77ff1b4e85552
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 numerous links pointing to compromised WordPress upload directories and disposable hosting domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms strongly supports the classification as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://inwebjor.ru/uplcv?utm_term=can+a+pulled+muscle+in+your+back+hurt+when+you+breathe PDF link annotation
    • https://micro-churches.net/uploads/file/81250181799.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/074d2ddc54183bb7f2639fcb90eafa03/67156556602.pdfIn PDF document text
    • http://vienhung.com/webroot/img/files/mogogefafovigav.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1484944e3---25423532364.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926b2b222ee---51790093970.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/d74ddb1c0c47771b312405d28f2130b0/56100646262.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce7c03a033---56805681053.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086aac277a09---19041919227.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/83597911466.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/6rruhqu7sla13qnbnbpfeav4j2/844019532.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6126acb6a---miguladorefote.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/kavomuzerabutededu.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe6f03047c---potokenajiper.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608857fa0c8ef---37392798935.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726b8e7309a---gakowopo.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/67113365355.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607feca5e8d56---905428080.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076982479927---zurimajexokuruves.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/21067475494.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/82980227411.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607300f24bf08---36816618140.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/629c17faec6c0570969b9ebda5ffe27c/zewadogolezop.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/8b6d900818103cbb5c262a39a85dd559/vexaludubo.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/rodobozoj.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/8fd88f15aa4098c2b748da50f17d4cea/597280853.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c5033e46b---78181441066.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073de9ca51ee---59715239845.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_off0000f686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF686 16900 bytes
SHA-256: b8fb6db0aac12e78f067c15ab51915aaf54c8930017ad06535a7309702f497a3
font_01_sfnt_off00012176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12176 11344 bytes
SHA-256: 899efe4014fa10f380408a341e479f4a99fbbd83bc294ac70955c8938dd3010d
font_02_sfnt_off00013bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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