Malicious PDF — malware analysis report

Static analysis result for SHA-256 4805fabc1b132bad…

MALICIOUS

PDF

77.7 KB Created: 2021-03-11 05:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3fb6bfb39c3552f947204b56e777cc75 SHA-1: a228bed14b349728386e1a997402ea3c230cc720 SHA-256: 4805fabc1b132badd8e8738caa7d3dac2a2bd8ba3d259a1af20c812af3769632
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to potentially harmful content. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is the primary indicator of a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/award?keyword=learn+python+for+beginners+free+pdf In PDF document text
    • https://cdn.sqhk.co/madagijoj/gDSicmk/remunawitosogafurokaki.pdfIn PDF document text
    • https://cdn.sqhk.co/lagidexetin/ghijCji/52610776723.pdfIn PDF document text
    • https://cdn.sqhk.co/zubejavaxuvu/et3lhdQ/wexobesumir.pdfIn PDF document text
    • http://kozevajalun.22web.org/rugby_bulking_up_program.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/ge7diaF/badri_movie_songs_mp4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/filaturuw.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/lagu_anderta_jujur_saja_uyeshare.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/ayushmann_khurrana_songs_list.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/el_general_naranjo_temporada_2_capitulo_9.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/the_revenant_full_movie_free_download_worldfree4u.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/diplomatic_protocol_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/bandaranaike_international_colombo_airport_live_flight_information.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/41161219230.pdfIn PDF document text
    • http://nadefivetokilak.rf.gd/the_forgotten_books_of_eden_complete_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/tamowakameduvajola.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/bounded_rationality_the_adaptive_toolbox.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/75759909577.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/48595746584.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/ontario_executor_compensation_guideline.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_off0000f1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EC 5456 bytes
SHA-256: 7fc49c7c1010f1cb72fa4048b1ec9a91aace804e852f76855e3dceefecc7bbcc
font_01_sfnt_off0001047e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047E 10924 bytes
SHA-256: d17b03ac418b9569f4391cf65c3bff006ffd1eb0d9c43bf2658c5a6afef8c9e5

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