Malicious PDF — malware analysis report

Static analysis result for SHA-256 443291fb361838f4…

MALICIOUS

PDF

76.1 KB Created: 2021-03-28 19:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4e8432ae4d1f0d1fc49bbd9823a4fe92 SHA-1: 5692f5b69cf25b2ce60397bf3abe0de08d935139 SHA-256: 443291fb361838f4ca80b5ce4eec43cf87c092bb67e0f06f906e71529e16ab7a
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://mezovuduw.ru/123?utm_term=honeywell+chronotherm+iii+t8611g+manual PDF link annotation
    • http://gikutikojaf.22web.org/39217355291.pdfIn PDF document text
    • http://missunik.space/tujolipidixibuzuju5rxgt.pdfIn PDF document text
    • http://tesepaxe.iblogger.org/typedef_template_member_function_pointer.pdfIn PDF document text
    • http://gosugas.getenjoyment.net/grade_5_math_workbook_free.pdfIn PDF document text
    • https://mobefoba.weebly.com/uploads/1/3/0/7/130776725/2387471.pdfIn PDF document text
    • http://gesetaxoxu.sportsontheweb.net/narefosutimukixutan.pdfIn PDF document text
    • http://gopadaxin.mywebcommunity.org/wanolixow.pdfIn PDF document text
    • http://cmbmarketing.agency/thrice_told_tales5yxvi.pdfIn PDF document text
    • http://natfreshik.fun/bryant_housewise_wifi_thermostat_manualojd3v.pdfIn PDF document text
    • http://joteruzawareba.iblogger.org/how_much_a_guitar_lessons_cost.pdfIn PDF document text
    • http://changely.club/79363647356e97uu.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/american_furniture_catalogue.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/official_methods_and_recommended_practices_of_the_aocs.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/annuity_guide.pdfIn PDF document text
    • http://pifafixejizigu.scienceontheweb.net/how_long_to_cook_a_25_pound_turkey_in_a_roaster.pdfIn PDF document text
    • https://jidisoluko.weebly.com/uploads/1/3/6/0/136097174/sujuzebeloposuxim.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/35b4778e-cbeb-4763-bd7f-19bf60092ebe/my_favorite_things_sound_of_music_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01f473d1-43e3-47da-acd7-f2a5270b550b/kixilesobulatafim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8728532-d3fc-4060-ac10-054e17eddfb5/jomotamuvetota.pdfIn PDF document text
    • http://zalowakudedakov.rf.gd/74787178750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc439ec-ab8a-4e59-bd4e-355e496a7b00/sample_sql_queries_for_practice_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/516b2a2a-57c3-40a8-a4c6-1f9142c28a3d/2007_jeep_grand_cherokee_laredo_problems.pdfIn PDF document text
    • http://wivaxodi.onlinewebshop.net/97513211395.pdfIn PDF document text
    • http://vimedunofonuw.rf.gd/what_forms_centrioles_in_cell_division.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_off0000e9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 5592 bytes
SHA-256: 7ef1f08b976634f8d618e9e7476402f1474fd87729e97f0eaccbca8ec649d552
font_01_sfnt_off0000fcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC6 10676 bytes
SHA-256: e5271025b62aff5cd15641cac154a9db536ebbd51a53819572b80fe243de824d

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