Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2ae02c097a85af…

MALICIOUS

PDF

74.3 KB Created: 2021-07-14 11:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a91c9169a8f48a365ca1f69a9fe293b4 SHA-1: 1bd81850588eae7b610900d5f212a5c6eb3edb3f SHA-256: 8c2ae02c097a85affb77c2b8b6fe3ddee7465b2053495dfa4f9fa81937a05ec7
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into downloading further malicious content, likely for financial fraud. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://wastran.ru/uplcv?utm_term=vehicle+addon+for+minecraft+pe PDF link annotation
    • http://kiavysocina.cz/UserFiles/File/mipemibijalusi.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/dbk1sji6a16bj4hfo7s4lcou51/12575194111.pdfIn PDF document text
    • http://northcity.rs/slike/files/tenobepedidizi.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/64797102294.pdfIn PDF document text
    • http://sammyuriasproperties.com/userfiles/files/80505744827.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/butoropadaf.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b354d7688b5---vibopodoluvoma.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/712170002.pdfIn PDF document text
    • http://jouezadomicile.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/16319935443.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/peluf.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/22e86c49bf5c6e3b555d297e537d9661/kogabafavomadikogud.pdfIn PDF document text
    • http://berbun.com/user_img/file/95316394450.pdfIn PDF document text
    • http://mousike.it/img_ins/files/80871488379.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/97573409030.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/7r392t3tslvmt9lobaoi9s1mdh/14192625961.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/bed49c19374359c6b9e42de126a34a4e/3179837776.pdfIn PDF document text
    • http://szpk.hu/_user/file/sozixavepexufo.pdfIn PDF document text
    • http://tulsacentral1963.com/clients/3/39/398188050227c7f1c8b3045a0a865105/File/73701510180.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/36180118740.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/159f33fa7357641c3b88447007579eab/12195266883.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2c5cbc038---nuwakitu.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/64660812990.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/mqrousn0jkoipo20q10rl4rl8i/11551174134.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_off0000c08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC08A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A1 10684 bytes
SHA-256: ba0a1d42b4a4c2a861b7fa6cf0364eadc865455f43610faded8250584a43e900
font_02_sfnt_off0000f0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E2 16616 bytes
SHA-256: 9e5fa316e3df29696f60908e3dc677d0bebbf31a40907c53d23e872b2a4e5f82

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