Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c3cdcb3e04de3d…

MALICIOUS

PDF

80.5 KB Created: 2021-03-05 05:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: df4c13bed10d1542697606f65fef2311 SHA-1: cfee9d6d4eb675cef062094e8e2566c92a6f78a0 SHA-256: d0c3cdcb3e04de3d3d7f5d322481579ad52ca9d81b744600032d9538085e6872
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://midufefew.ru/123?utm_term=habitat+for+humanity+house+colors PDF link annotation
    • http://ita-fitness.fun/wajubadobibukaqysfv.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/24892219204.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/is_no_game_no_life_light_novel_good.pdfIn PDF document text
    • http://awpmode.com/wd_my_passport_1tb_reformat_for_mac5ffoe.pdfIn PDF document text
    • https://cdn.sqhk.co/gitogozune/7Midkih/dakumojidowag.pdfIn PDF document text
    • https://cdn.sqhk.co/wunemuruk/jZijO2t/youtube_tiktok_mashup_october_2020.pdfIn PDF document text
    • http://titoto.xyz/excel_average_all_sheetspbh41.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/48006551933.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/10219256513.pdfIn PDF document text
    • http://smm-target.ru/semagoxadeluvawad7d0jl.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/tuvekaditamamo.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/logitech_mk710_keyboard_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/cgfKjgS/venawevemebogaw.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/vhfuRF0/81778682441.pdfIn PDF document text
    • http://puveputado.sportsontheweb.net/58792300175.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_cbff3194372945a6a6e5f49b5acc614c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ba5256-dc1b-4c4e-a7eb-370a81f581a4/what_is_the_difference_between_niv_and_nlt_bible_versions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e97ffd-a144-4282-aa2d-c01db500c994/examples_of_irregular_verbs_with_past_present_and_future_tense.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b856bd5b-1db4-45b9-9684-d50ca09ec71c/4146777464.pdfIn PDF document text
    • https://9462281c-6212-45c1-8f90-c4e3c363a226.filesusr.com/ugd/007d40_07e8d6cfef23491cbfaa1d18adb8def9.pdf?index=trueIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_0b22a7202e994d17a544929427f4644f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bfe0eba-f6c8-4fb1-9da6-c2774dd5e9d4/what_is_the_crust_of_the_earth_mainly_composed_of.pdfIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_20440d98c76d4ef7b13937e371f773d5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf2ebbb-1686-4191-a09b-1a04aaac3768/what_is_a_keyword_research_tool.pdfIn PDF document text
    • http://pudolajuji.atwebpages.com/de_que_trata_un_mundo_feliz.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_off0000fb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4E 5324 bytes
SHA-256: e3a9e5fa8b6271d874e3e00a26dc5808838a631424dc1fba17f486efe5d0a312
font_01_sfnt_off00010d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4A 11372 bytes
SHA-256: 5c61f119a14391fcd869b789648c0b4538f16168424980e6906712a29d69f228