Malicious PDF — malware analysis report

Static analysis result for SHA-256 15aedb88b1384bda…

MALICIOUS

PDF

73.3 KB Created: 2021-06-09 01:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93cb24912ba05a52f2fdc86c9c59e620 SHA-1: ea2f994acb14eb2f6a0137ce25611a43c9939a37 SHA-256: 15aedb88b1384bda69b64404f9407e09ba5c0ec7a4edb3e1ac7ebb56b62bc253
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a domain associated with phishing or malware distribution, disguised as a font download. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, likely for further payload delivery or credential harvesting.

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://inwebjor.ru/pbw?utm_term=adobe+photoshop+font+style+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ce600095-d9c2-4dad-9b02-bb6162dc336c/mathematics_books_for_grade_3.pdf
    • https://uploads.strikinglycdn.com/files/f89b2671-e655-40ee-a19b-979f3e4cdab1/sda_bible_concordance.pdf
    • https://uploads.strikinglycdn.com/files/c9baefeb-d53a-4720-906a-228ad9106355/warhammer_40k_6th_edition_rulebook.pdf
    • http://silasofinat.pbworks.com/w/file/fetch/144791112/34597796476.pdf
    • https://uploads.strikinglycdn.com/files/43b5f521-aec3-4912-bacb-6a4eb0fb96ed/tozusaji.pdf
    • https://uploads.strikinglycdn.com/files/d3732b01-8720-40d2-b757-a9ee8a8dc8aa/9644724421.pdf
    • http://vafobotigef.pbworks.com/f/lala_rudge_e_bruno_khouri_terminaram_namoro_2020.pdf
    • http://bemulopawed.pbworks.com/w/file/fetch/144801795/basit_ingilizce_hikayeler_indir.pdf
    • http://puzavofan.pbworks.com/w/file/fetch/144549276/wall_e_full_movie_free_download_hd.pdf
    • https://uploads.strikinglycdn.com/files/e3a3e8d2-4130-4d07-b53a-c00f9063ed3b/75506675008.pdf
    • http://bazibenis.pbworks.com/f/casablanca_violin_sheet_music.pdf
    • https://uploads.strikinglycdn.com/files/67aa0192-e19e-4a23-825b-f50a831ea051/blogs_de_libros_juveniles_para_descargar.pdf
    • http://nubuzefi.pbworks.com/f/mudor.pdf
    • https://uploads.strikinglycdn.com/files/2097319f-5c1d-4ec7-82c9-997ec1036cb8/rider.pdf
    • http://naxoxututal.pbworks.com/w/file/fetch/144444090/mapa_conceptual_de_los_diferentes_tipos_de_reacciones_qumicas.pdf
    • http://bezawagiga.pbworks.com/f/ludoxudu.pdf
    • http://xedidovetaw.pbworks.com/f/34747599122.pdf
    • http://zewalar.pbworks.com/f/26326151440.pdf
    • http://mituxap.pbworks.com/w/file/fetch/144657924/relalenosuzimegigapu.pdf
    • http://gipomebepate.pbworks.com/w/file/fetch/144761484/schema_electrique_interrupteur_2_ampoules.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3dd.bin
f5a70725dbf289545b287a3a687a0034379b18348c499c87d40b4b1aa1975ee2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DD 5452 bytes
font_01_sfnt_off0000f674.bin
054e21f4673f7e0fbd3ba03d8c64fe8548affbbfe5bed99c31d7dad64451c806		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF674 9804 bytes

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