Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d877276849a96f1…

MALICIOUS

PDF

80.7 KB Created: 2021-03-29 03:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d9791e2e92777bcbd4f0dfbe79c244f3 SHA-1: 2a5d213117ad9420ef618552ff38c3970c490c26 SHA-256: 3d877276849a96f1499e0867bf34be4bf3b965c8d93cba3fe078650aabc2ccb8
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 0.9996

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://baarspo.ru/123?utm_term=bridal+shower+thank+you+cards+template PDF link annotation
    • http://konobemozitu.iblogger.org/agenda_2020_para_imprimir_gratis_portugues.pdfIn PDF document text
    • http://ropufogesuzazeg.iblogger.org/netflix_s_not_working_on_plane.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/iQUBA5G/rewatoposogixuzixi.pdfIn PDF document text
    • http://nalilix.iblogger.org/duxawalog.pdfIn PDF document text
    • https://cdn.sqhk.co/faruretekiv/jjhft1B/out_of_the_loop_among_us.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_adffd0685cc14de7bc0c0c023ee3f844.pdf?index=trueIn PDF document text
    • http://zemonipovop.epizy.com/english_grammar_terms.pdfIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_46ef3d835f5a446bbe6e21159c81fc89.pdf?index=trueIn PDF document text
    • http://dejupaxifitat.rf.gd/ishikawa_diagram_excel_template.pdfIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_0f0358cdca3f495fa4903165e464e89d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d6fd6d6-78ab-4b1f-8fac-ab392201f519/karemaxebawis.pdfIn PDF document text
    • http://ludilisi.epizy.com/xezife.pdfIn PDF document text
    • http://fezavirofi.epizy.com/40111225048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0e425c9-6579-4df3-b37a-ef635ecb099f/noledosobezasixebugegit.pdfIn PDF document text
    • http://medemamonolusav.rf.gd/islcollective_answer_key.pdfIn PDF document text
    • http://nikadukukoz.rf.gd/52598026359.pdfIn PDF document text
    • http://rijejonusax.rf.gd/67280188542.pdfIn PDF document text
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_1feb85d0866d4d77b5b98cdce68fdbb9.pdf?index=trueIn PDF document text
    • http://nonixita.rf.gd/domino_s_pizza_lebanon_menu.pdfIn PDF document text
    • http://pupisovid.epizy.com/how_to_reprogram_a_liftmaster_remote_keypad.pdfIn PDF document text
    • http://sufekowanak.rf.gd/winrar_free_english_version.pdfIn PDF document text
    • http://resutujimi.epizy.com/harry_potter_movies_list_year_wise.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_off0000ff39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF39 5620 bytes
SHA-256: 9fd0eb7ba42177f400c51b84daa490fd1b895e874521c3ecdad24e38f9106d4d
font_01_sfnt_off00011241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11241 10196 bytes
SHA-256: 48e5b0565e7f7275772336904e868b9737b386121e00b39e6d484afd0bf07757

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