Malicious PDF — malware analysis report

Static analysis result for SHA-256 2942a91fd7a0a074…

MALICIOUS

PDF

74.5 KB Created: 2021-05-29 07:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a2fa8c714a78d7ffcedb41ee1b834a64 SHA-1: cf5bcd3641ca4c9ad4d8340bfb95966a6d6e040c SHA-256: 2942a91fd7a0a0744e0c13b67897dce81f88257dc4be1d5873f5d5edf1486bb9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, characteristic of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/strik?utm_term=libro+nacidos+para+correr+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424689/normal_6017992963ab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484355/normal_603eeff724466.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389821/normal_5ff99655c124f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423728/normal_5ffd752f67916.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402944/normal_5ffeefd9034fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_601e2d47ba392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393889/normal_6023c05d38291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_604063665dcf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_602588e4003ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459027/normal_6007b418e4026.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464720/normal_5ffae83833506.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/15660049-0dcd-4b6d-a448-16223e519eb8/safety_data_sheet_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/268a0e2d-926c-4f8d-a619-fde86a64460b/73761136474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30de2f1a-90e9-463d-9e3b-518e06fc7535/solving_quadratic_equations_by_factoring_quiz_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7bab58-d305-4fd9-a457-5590de0403b5/lawali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8aa4c99-04fc-4b0b-9eb9-df4280381a2c/what_are_the_components_of_mis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6539cdf1-6362-4b1a-bf12-310a30d8e5b2/8011427817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be1f401d-e8c9-4c27-8043-7e35beafea24/how_to_measure_ring_size_uk_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d07305-3488-413e-b26c-b1d403d27d0f/does_autozone_let_you_borrow_jumper_cables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3735f2-2fb5-4da6-a6cf-02178b1b9da0/36844276458.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08B 5200 bytes
SHA-256: ceeac216e90056da904170b453bd40317894c957b9f31284681bde89d2120001
font_01_sfnt_off0000f240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF240 13280 bytes
SHA-256: d67630a06f5b155d885e9e309d5fdf7e26285f239da9ef1559fcf83f7b8c87a5

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