Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dcd2acd3822dde3…

MALICIOUS

PDF

511.9 KB Created: 2021-08-02 02:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 60aed18fdc527ab4fcb2d405452cd2f3 SHA-1: 8b745a24d07920b1847a00408732018f4a1a6b38 SHA-256: 4dcd2acd3822dde36b3ba49b94a30d2e279f2adbca6604d9ec4c4a4fa57d767c
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, specifically within the 'formcraft' upload directory, suggesting an attempt to host malicious files. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the presence of these links indicates a likely attack pattern involving the distribution of further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7463

Heuristics 4

  • 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.
  • 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 http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf6c95d4b08---wisexilosakogojura.pdf In PDF document text
    • http://av-jet.ru/userfiles/file/48549332246.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8cc11e2c4---bituloxisitumupa.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c96cc142c60---24005856151.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9a25344c2---91573486759.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/xemoxe.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/limus.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/e3a637c2a928fbafb10ddb5db23c6af9/4829377269.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210607_9DCD5F992DDF9534.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b435a88022e---25060281260.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/ponumaz.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/cd09929ed0b9577427a15f2fc7eb86e5/runuj.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/29360892194.pdfIn PDF document text
    • http://katachizu.com/img/news/files/kikuwiki.pdfIn PDF document text
    • http://stepsforstarlight.com/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/97986041743.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/zabapukab.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/2528143818.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/pdnej7u2o4vhub7461jkngdgi6/77293408001.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/pegukozosimatad.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/8ubv2dt1kfiu2u5j6o6a11oaf0/52853755468.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/wevajorozododinorafu.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8bd3f3ce7---vevunopajosone.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/10236793953.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/tazegako.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=klasik+yunan+mitolojisi+%C5%9Fefik+can+pdf+indirPDF 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_off00078873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78873 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0007a08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A08A 11452 bytes
SHA-256: 82bcd33bda7af1bada276e78b15e52a430374835302a3e10842ba9f437625bd3
font_02_sfnt_off0007bb1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB1D 19948 bytes
SHA-256: 1b66c4ae6439f154ef1c57e822922c12323b8b5e2efca76aa2c3bd3b8e65e600