Malicious PDF — malware analysis report

Static analysis result for SHA-256 70833188f56cc348…

MALICIOUS

PDF

81.4 KB Created: 2021-06-26 18:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f5765e293f293acdbd0cf077cf87615c SHA-1: 5177f399f720cf2f8c3ef41b750e3125224dbf29 SHA-256: 70833188f56cc348ea1dd7ee0b9c385485ed0a48f9df08ea026c6ad4e375280a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress uploads and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The PDF's structure and embedded URLs are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://huntic.ru/uplcv?utm_term=bellaire+and+gessner PDF link annotation
    • http://cassotech.nl/site/data/ws/files/webaxiwawudetobupakat.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/siwezojef.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/b4c777d7e8f2ba1667ba79c9527d7f2d/noxanawa.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/xuwabefasupogomuwepa.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/36945951473.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/vixavobe.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/47764008076.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607125777e9c3---taperutakaxixosaroxufis.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/394830cbf4eac5eb84f71258809327ce/gavepedudufuvaxipoje.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/wixamubor.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/68340728278.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fa6f85587---90923543300.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/a1e6cd65c35a7b3de51054becd644ad8/14677532875.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/5tk1ob7aekfb20kv3dligpog74/dujifiwipi.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/e0b63d0f507aa03dcd110f8d8afb06ed/20981473131.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7hgm8v1j1q33jtqu0a5um4mch0/jumokogusakimixekegami.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/e5ce251fd686c66a5f98d66bdad1c5e4/3566618237.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/6558d88ce67533d0adf7a77cde651412/megapuvurirugavi.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092168561706---87883655216.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/5nep4ea3ja5jge6pq9doihlmtd/30930934896.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608502f07c144---46416319824.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745617b7a29---42550739734.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c060813d781---21935317078.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e108427d4---rasolevafiwula.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/21139751.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b8355f56387---giweluxekofago.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_off0000dd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6B 16792 bytes
SHA-256: ef6ba4452117e783522967994a5db2084ac88d2ca5b393071a9ccbf42623c0fd
font_01_sfnt_off00010945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10945 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001215c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215C 10260 bytes
SHA-256: 7ac2026eb3b8586f7356fe61aa29e9d1b424ea998c86fafb299ef49e73641c4c

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