Malicious PDF — malware analysis report

Static analysis result for SHA-256 e275ce5322d421e4…

MALICIOUS

PDF

76.5 KB Created: 2021-03-17 15:29:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5ffff4bc3dfef25a8ca67145bd2058d8 SHA-1: eba8b375c37eacb6d3347d3a62379a440db1ee98 SHA-256: e275ce5322d421e40250d071a1694c316cffe4c684843676910a652d84e4bb08
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/strik?utm_term=why+does+my+evaporative+cooler+leak+water PDF link annotation
    • https://luboguti.weebly.com/uploads/1/3/0/7/130739177/warowetoruzuvezikik.pdfIn PDF document text
    • http://vas-rem.ru/40921345107guqjm.pdfIn PDF document text
    • http://varietystore.website/rush_2049_arcade_cheatsioj1x.pdfIn PDF document text
    • http://menbp.online/dirt_devil_carpet_cleaner_reviewsx6sev.pdfIn PDF document text
    • http://podarokinsta24.online/dijugohs0oc.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/fjaNjjr/congruent_triangles_worksheet_answers.pdfIn PDF document text
    • https://sasofisapen.weebly.com/uploads/1/3/4/5/134590640/tesuxogutirupa.pdfIn PDF document text
    • https://biruwilajefi.weebly.com/uploads/1/3/4/6/134651793/8532487.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/jahcqgg/xawemolavovewuj.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/gg8jjid/61450112649.pdfIn PDF document text
    • https://cdn.sqhk.co/nezupusovefi/agihege/1000_words_lyrics_scroobius_pip.pdfIn PDF document text
    • http://shothard.site/rivaxinemegiwejunajapinojn2s6s.pdfIn PDF document text
    • https://cdn.sqhk.co/wevubuse/jhljhU7/hide_seek_game_rules.pdfIn PDF document text
    • https://tirilume.weebly.com/uploads/1/3/4/8/134886795/kebolo_koregos_likenumevedu_zomugisovuw.pdfIn PDF document text
    • http://cosmeteca.com/8625860262268wlc.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/e38f7184-e4f3-4986-bef4-ed3016f75c2d/zidositufowuxurolo.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/project_manager_exam_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4decce2f-ea69-48a6-9336-f5cd88495644/bujaroduzewor.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/roadies_audition_2020_registration_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a162da-0afa-48b9-bd08-c80f87769b44/what_causes_reading_fluency_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/esp32_datasheet_adc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ff5526-595e-4ba6-8253-8901a2d1dbd3/que_problemas_de_aprendizaje_existen.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/android_tablet_amazon._ca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a7cea6-3eba-426a-8acb-a69703b5085b/watchmen_movie_download_in_hindi_300mb_worldfree4u.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_off0000ebd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD0 5644 bytes
SHA-256: b848b24612cc72077f5cbeb6493babde9ac502efd438a22b0861c47b3bd6dd4c
font_01_sfnt_off0000fef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF9 10772 bytes
SHA-256: ecc197dd7f7043ea66e17b977995fa1987dba27c1eb10bc4ccb5055d7ecdc263

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