Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca420fe74e944ec…

MALICIOUS

PDF

74.4 KB Created: 2021-06-04 08:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8da983260deaa21cbf702e70e565a049 SHA-1: d233a7a3525e79c338ec22e6f10fc88472723910 SHA-256: dca420fe74e944ecd99bacf2b242c3d4b5e38fb7cb5e876f749c4320e6588a0a
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://cructi.ru/pbw?utm_term=what+did+the+ancient+egyptian+gods+do PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420775/normal_5ff7ab3815ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475720/normal_6017359f80beb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498366/normal_6009043b8fdf6.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4444353/normal_60b6a48ce7e55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386829/normal_6050106b6d5fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403429/normal_5fec6760c2f4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365660/normal_5fcb1d8689cc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_602050be43559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_60513ecdbb782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_601744f6701c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_604e1cbd96189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402938/normal_60152c6e49159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489032/normal_603685c6dc874.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445731/normal_5fe4fda9e3db2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494136/normal_603877ab5c80a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_6024a410d0e67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460450/normal_603bed4eb09db.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/09a9c87f-5041-47a0-bf69-172f8635b0c9/what_games_can_you_play_with_thrustmaster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e7ee9c-3d27-46e5-bd23-64d98d1bbb54/los_verbos_irregulares_en_ingles_presente_pasado_y_futuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d9e708-8256-4818-9276-3e2d8096c4f4/vubifuvutuxipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aba45d4c-7ad8-4a79-8182-e8e1b41169bc/herman_miller_aeron_seat_pan_frame_replacement_size_b.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf0af0c-0dcc-4107-ba23-e175e220d1c2/zodobuwalabegifudiwepuziz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325ba0f6-c141-4051-bada-39876a204ca7/30060004183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffaba4da-df79-4c49-aaf9-6597f9d6548e/12852691533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507f59d6-98c4-4c3f-b076-699f111a17de/zivuxa.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_off0000e53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53E 5324 bytes
SHA-256: 1b40c6c7dee9463dbe01285f422e1453e17ca3102e8d56efed35def8f8b9c6f4
font_01_sfnt_off0000f770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF770 10308 bytes
SHA-256: 298418c8a674bbc9135823871cc031c70353f39ff8b975f74d0e4354cea9d30c

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