Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b8d6252f463004…

MALICIOUS

PDF

91.2 KB Created: 2021-06-27 21:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8d92f1380d3a945128216c231624fa4a SHA-1: 4d91264e754528163a5e7c31ec3045af0f5573fe SHA-256: 67b8d6252f463004795ce81fb850c1ad635e5a322006ea1f74b0c1617bb1d85c
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by an ML classifier as malicious and contains numerous links to external sites, many hosted on compromised WordPress installations. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to mimic an invoice or payment request, encouraging users to click the embedded links. While no scripts were directly extracted, the nature of the links and the ML classification indicate a high likelihood of this document being used for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/d49077b9ea99fffae4b29f2101ec919d/57559121158.pdf In PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/befmusn83b0s82ld7brmp90vp8/livapovoguj.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/kepexabuzimapipetumabi.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/77a7435c9d731bd2bf0837bb73682c23/84191834037.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/nb5frpqqhr0k89f9ejrs1e23md/busavuwekirakinopet.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/89526272137.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/546a3b660155eeb7568b4efd0b894f5d/6801063495.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16094b543dbb08---litisikopubipemif.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/vilopos.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f18538555c---wigipuxazasofemigubaloxe.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aefda694578---2878371072.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/fanamudedibalokiboz.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/fuqhv2qg65hm2qg4qrd7h22tut/kewenoxopez.pdfIn PDF document text
    • http://indecomavo.pl/inc/36187088069.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608efeb194046---27361904851.pdfIn PDF document text
    • http://fedime.org/imagenes/betibiniweja.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/ef466c3c3fbdf6f5817796ec21285934/10893112496.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/83256330742.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/90745998134.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/5f4aot13f4g4cenfk5vnged21m/berozajilela.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7efe6641e---28163101386.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bde617f4f---37407713936.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/82479207926.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/rixujuwir.pdfIn PDF document text
    • https://tmtteks.com/files/lenafasofulirokowijiforom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=sample+verbal+verification+of+employment+formPDF link annotation
    • 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_off00010143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10143 17044 bytes
SHA-256: a078c65fbbc7d3320ab9e6d7c9d08447b9c0339c8c4317b8f5b3d9a7e9122a6b
font_01_sfnt_off00012dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000145ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145EE 10868 bytes
SHA-256: fc14b17057f60583251ea0d7f7c8f84f88ec096909c208b128783baf98fedc06

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