Malicious PDF — malware analysis report

Static analysis result for SHA-256 931bda96b1da44e3…

MALICIOUS

PDF

147.9 KB Created: 2021-03-18 13:15:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fa759d693d0b94b9f1f1a402c042fc36 SHA-1: b20de68dff2dd1cac02e29a3ec34618eb6c5c20d SHA-256: 931bda96b1da44e3b775b1ef4a2b77ab8368c01a09a5601a7e42f7b54652bc07
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/wix?keyword=imperio+bizantino+mapa PDF link annotation
    • http://jefevivavifax.scienceontheweb.net/louise_hays_park_history.pdfIn PDF document text
    • http://smartradiobf.ru/dark_souls_remastered_guide_lobos6l97x.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwegamuvev/j0yOmjc/jirenudisilovifimow.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikebepo/osLmpEL/7374774080.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/file_police_report_for_stolen_package_fedexlz3xc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402246/normal_60302884d5cd7.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/how_to_tell_if_you_are_above_average_looking.pdfIn PDF document text
    • http://repair-monokoles.ru/create_sql_tables_in_pythonq4lwh.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/les_misrables_movie_soundtrack_-_red_and_black.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413462/normal_5ffc787a13c32.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/eji8iji/zero_vector_eigenvector_of_matrix.pdfIn PDF document text
    • https://cdn.sqhk.co/mebozesilo/2hebwCt/60217594009.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d348a87-eab9-4ad3-8da0-43c2f7b3214b/what_is_the_history_of_islam_in_africa.pdfIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_b4680169c36444899bc8237a4e0d301d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a17e1dc-dffa-4797-977a-bd5d27f3a794/sample_employee_comments_on_performance_review_examples.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/how_to_adjust_bipap_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c21e982-2bc2-4f5f-be8a-23ee5c852d70/winchester_model_94_30-30_top_eject_scope_mount.pdfIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_7606a20ee0b24a3897dae15264ca73f9.pdf?index=trueIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_3f45d73363184dbda33beda9190a94d2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fbfff70-d124-4f73-b042-a6eecee7a244/mujilejutoliwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d7e588-c716-4bc7-9093-faa6dab7b6e7/the_criterion_collection_streaming.pdfIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_f2ba8dbcc73249e39d73c7ee832e8214.pdf?index=trueIn PDF document text
    • http://zodiripek.myartsonline.com/anhima_cornuta.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://scripts.sil.org/OFLIn 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_off0001e78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E78A 4884 bytes
SHA-256: 7498db6db3e47b48cac7bb72b26fdeb9ffc45bd8acd1e0d97fc3cf24c9a123a1
font_01_sfnt_off0001f80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F80D 16700 bytes
SHA-256: 177399de9887958ce7b512c734e3581914b3968cd747eacdabc218cbec8cf00f
font_02_sfnt_off000229bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x229BF 16392 bytes
SHA-256: 9774e91a6b2ef0cff796bc3983581447eee96e7159bb0974d0591db5a5b68d1f