Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ac7bc9d0c77725…

MALICIOUS

PDF

87.9 KB Created: 2021-06-26 05:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8bf4ba5fe9cc5d27b9991ad2f10854c5 SHA-1: 724d8a81563395991430d54a6967d8bf1ffe5b34 SHA-256: 72ac7bc9d0c777251a2d0633f2c879f26d139f020b58ff337f049648469e0be5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains numerous external links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the ClamAV detection strongly indicate malicious intent, likely to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://irlanc.ru/uplcv?utm_term=fill+in+the+blank+questions+and+answers PDF link annotation
    • http://allmedicus.com/userfiles/file/90783092118.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/74328417095.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/mipesuxudew.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8428be892---fosezinowiwagutomo.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/6j3vp957dd2ujf4i3ds7rt2t82/59888953919.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/fqphls59hm83mfdcod5tlrdsru/90115141483.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/64625827555.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/70628125591.pdfIn PDF document text
    • http://wedding-ideas.ru/ckfinder/userfiles/files/53596209290.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/fdl1k5espfamnta8229hfptsul/xukezewigufawi.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/99754d5530acb91bd8e7426de46ed1f9/58677096502.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16095d190c6b22---4533967068.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9ec15178c3069620cc73c1de1ab0af34/35105882696.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/21263864161.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/81769818664.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/nenajomijafusezotolivagod.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16093a7e429f86---bubixanulifan.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/sazinonotoxonabapamuvu.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929395f2505---vojawoxapu.pdfIn PDF document text
    • https://actor-conseil.com/files/file/sozetujo.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/xolanuwijuluxoponofigifin.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8f67af8c1---dumov.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/586ea659f2b088aeecefc8e0df21a8a3/danomedop.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/0e994290df127a96afb00b5467733a45/wofodawosulolikixom.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/xukerefekujija.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_off0000f4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C3 10884 bytes
SHA-256: 0595d53a9db96bd8c8ae77764b730d26d54d4a948b31632cabe1013d99c8079b
font_01_sfnt_off00010dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BE 17088 bytes
SHA-256: 84399a3bcd7e248062f80a05600e3e4318adf640730c68bdc34bd6b31cf9e7fe

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