Malicious PDF — malware analysis report

Static analysis result for SHA-256 deee722267534a7f…

MALICIOUS

PDF

88.1 KB Created: 2021-08-04 22:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 389e1d788b3d90811419cd89fbb637e1 SHA-1: 616c3c08b4ceb00f5d71c9448544f12f7de6d166 SHA-256: deee722267534a7feba693bdc011bd2de962a71a23c41ba5c9f4b9938c8258a7
96 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and other domains hosting PDF files. The ML classifier strongly indicated maliciousness, and the presence of a link farm on disposable hosting suggests an attempt to manipulate search results or distribute further malicious content. No scripts were extracted, but the primary attack pattern involves luring users to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 5

  • 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://wilocom.ro/ckfinder/userfiles/files/3922601801.pdf In PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f951179940---silifaveliga.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/d90b4feffe7d2c6e73562e2a2afa6f8d/fivenesavosefimezifarop.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/sirokujitiwowuduzonofoxiv.pdfIn PDF document text
    • https://anjingliar.com/contents//files/pewokijarugewo.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/80367837232.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/bgcdssimek07punvuomlm0cgg3/woliwebunexemukizej.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/g709nm3bvuj8avsgoc768gheo4/sawaxesezejedelipenuwif.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/40535402748.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/fisedekuxuxoxibirebiw.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719009a01db---pojoxe.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/3703dbde19d29c0bdeea3472bc80f97b/feseva.pdfIn PDF document text
    • http://bowlinggreenhsclassof66.com/clients/b/bd/bdf8ab256cd88a603fc2b95a051c5839/File/77193473650.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9163189333---zebiwalog.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/kopiribep.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/82481227202.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/96913311677.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/kavid.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/bawesupere.pdfIn PDF document text
    • http://bjjiffy.com/upload/vapopuremobituramofexu.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609daec895099---85188253905.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e326736025---42194882771.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607434ce01601---15225291745.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/96751265527.pdfIn PDF document text
    • https://wecareprogram.org/images/file/paxelefoka.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/xitegozalolebeme.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/43caff5fea876158fb1bc5f31be428e0/difefuzat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=minecraft+pe+4d+skin+maker+apkPDF 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_off0000f4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D09 16712 bytes
SHA-256: dd4778a7eacd0a69e9a875026a190a86af566f38dbf799f848e972699c6b5140
font_02_sfnt_off0001388e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1388E 10776 bytes
SHA-256: 7aa463d90dd0558701288486b75e75a8a02ceedf5a6c845981da31b6d5a66ab6