Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddfafc885ab2aea…

MALICIOUS

PDF

76.5 KB Created: 2021-05-15 00:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fbe21c11cb88306a24e76380432926cc SHA-1: b9bbc6c4721b732db4d21312b8d4cfa7e340e270 SHA-256: 6ddfafc885ab2aea8ead7b4eacb67e2ecbe200914686a3b04707cdd30ae1e957
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or SEO spam. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of many external links suggests a potential for downloading further malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=dyson+animal+vacuum+cleaner PDF link annotation
    • http://dexujin.iblogger.org/accounting_related_interview_questions.pdfIn PDF document text
    • http://dudoguxu.22web.org/reloj_solar_casio_aq-s810w-1avef.pdfIn PDF document text
    • https://cdn.sqhk.co/votijavos/czigjhZ/grow_credit_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwesedujila/iijexgg/25462000250.pdfIn PDF document text
    • http://voxivinojoniriz.22web.org/brain_teaser_worksheets_for_middle_school_students.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/U1haXhg/suwovobosadoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buwomir.epizy.com/menigif.pdfIn PDF document text
    • http://renulekefa.epizy.com/what_does_the_bible_say_about_plagues.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/tukujalizom.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/lapugiruwele.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/lizel.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/32700300310.pdfIn PDF document text
    • http://tatasoge.epizy.com/weekly_calendar_planner.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/bsc_nursing_entrance_exam_format.pdfIn PDF document text
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_dc86e4b9bbd94a89a2e5d112a24602cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jinabisura/visual_studio_2017_android_emulator_no_internet.pdfIn PDF document text
    • https://7605c768-a471-4169-85a9-0dab509fd250.filesusr.com/ugd/20ab23_75385fc2c0394522b8fc28eed5a653d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/everfi_module_2_final_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/anaconda_3_movie_video.pdfIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_2e34f971018a4422ada4b4047af52805.pdf?index=trueIn PDF document text
    • http://pulitanoxegoni.epizy.com/calculus_with_applications_9th_edition_solutions_manual.pdfIn PDF document text
    • http://jefesati.rf.gd/fairy_tail_anime_characters_male.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_off0000ed38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED38 5108 bytes
SHA-256: dde486baffc1a43e57a115d3a984e30d06aafbe3cab9bf9ea810c373b978e133
font_01_sfnt_off0000fe94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE94 11288 bytes
SHA-256: f51a1033420e00e7b9bc136a8f57d0db411a2c6d386433777f541d69a6f9cc9c

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