Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f718c5283b0da7…

MALICIOUS

PDF

83.5 KB Created: 2021-09-02 01:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7d0fd5a89d2002fbc96cc287a8386048 SHA-1: 508bb899c8e710592d9939f54fce53a93bbee7b4 SHA-256: b2f718c5283b0da7567a2c8faec098c6c045e3ac36a534f981c4a9dc561d704a
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to host malicious files. The heuristic 'SE_INVOICE_LURE' indicates the document's content is likely a deceptive invoice or payment request, intended to trick users into clicking these links. While no scripts were directly extracted, the nature of the links and the lure suggest the PDF is a delivery mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://coretry.ru/uplcv?utm_term=revenue+expenditure+in+accounting PDF link annotation
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/42t85jin3ept7887k2lftfjnt2/64708182662.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210704_7B3FC73E6882AA46.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/jabere.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/denusaru.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4410f2f19---menuzavamowekijuro.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/bekib.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5d04c8a0ad24ca837c9f4adc2ef921aa/50380895455.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/44458633039.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/45794356758.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/fadenoxagalegitamerep.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/38468447527.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1056ce998b---67955975017.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/e5e8098295d51b042cf5262effee874e/92562541093.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/76784890283.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/10caeb1e09088456064b47fb724bbdad/13168099913.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/13237574621.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/wanovozusad.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c923220a745---meserumunifalusobofesiw.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/rugibiwu.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/misutufetodujiden.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/buruzatajeren.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/j0ifc3tjeu565rnbo8n76tbn5l/25706049298.pdfIn PDF document text
    • http://preiss.at/upload_files/files/75690231779.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_off0000e13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 10788 bytes
SHA-256: 6f57ed9a25b613b5f61fb06f85acae532b73a5fd6964fe6558618799b959e2ae
font_02_sfnt_off00011221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11221 17372 bytes
SHA-256: 25de78c6445035928f6ee55a2d8f0ff49dd8de0872945709b4c27e259cc918d7

Open this report in the interactive analyzer, or submit your own file for analysis.