Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8c3a07f5846b93…

MALICIOUS

PDF

69.9 KB Created: 2021-03-18 08:20:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a0d4bba91e988841a4c66c0857be1e45 SHA-1: 9011bc08cd1cf38ae8dbffead4ca738fe104d5ef SHA-256: df8c3a07f5846b93e96125e7845a6908b1eb76f7070d65e818e17113dc8ebc53
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 0.9971

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 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://gimoguvi.ru/123?utm_term=case+study+questions+and+answers PDF link annotation
    • http://vevufilusik.scienceontheweb.net/zipabugaxujewikirijumij.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/dklFtja/md_anderson_jobs_research.pdfIn PDF document text
    • http://talajifit.mywebcommunity.org/negano.pdfIn PDF document text
    • https://cdn.sqhk.co/xikotoxerov/fjaghge/70226441899.pdfIn PDF document text
    • https://cdn.sqhk.co/xumefugafa/iclcqif/59701232109.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/65311605642.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/burger_king_august_2020.pdfIn PDF document text
    • http://kafofal.mygamesonline.org/57296170983.pdfIn PDF document text
    • http://siwupezomejen.getenjoyment.net/beethoven_pathetique_1st_movement.pdfIn PDF document text
    • https://cdn.sqhk.co/felatadag/jbAjjja/panivavud.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/uhiWtid/28178763970.pdfIn PDF document text
    • http://jevopapivixepe.iblogger.org/idar_weather_report_today.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/52232619-a659-4963-8a83-783a3043136f/the_crucible_act_1_discussion_questions_answer_key.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/puzaxikeraze.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/lebelotefirowanilabu.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/mythic_odysseys_of_theros_alternate_cover.pdfIn PDF document text
    • http://jagujozibajafiz.epizy.com/adjektiv_p_svenska.pdfIn PDF document text
    • http://wegugoleta.onlinewebshop.net/51529750650.pdfIn PDF document text
    • http://zufonokimilije.epizy.com/lugufudabepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23d01c62-f098-4d73-b6f9-ce99e5b0a5f2/10666247823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d643e5-d9a7-4b71-882a-2f70329df4e3/98182371481.pdfIn PDF document text
    • http://patonaxugoxogix.epizy.com/after_we_collided_movie_cast_bts_part_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57036446-1a2c-43d9-b0a7-e6d2f0879975/why_wont_my_vizio_tv_power_on.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/safest_mobile_browser_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af32fd67-413f-4499-8e7c-b6e57521d422/95265486613.pdfIn PDF document text
    • http://wasaxeradiko.rf.gd/56814727434.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/relieving_letter_template_india.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_off0000d4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CF 5012 bytes
SHA-256: 95db021c63d6e4e1332403346d8b15e9a9cf9474d84e61db40416630bfa0156a
font_01_sfnt_off0000e5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F9 10612 bytes
SHA-256: 82f228d2a84dc628d8c7f2debcda4d093d3f7a4019081ceb830eaeb049f29ce4

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