Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ede6c6608b7b12…

MALICIOUS

PDF

86.8 KB Created: 2021-04-03 21:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 232afd27a7d5e7caf2707ab32b20f72d SHA-1: 517627ce58506847ee03edf6edc019c97bdeb87d SHA-256: 01ede6c6608b7b12674ff67271e26aad7f6ec3e9a1276f49e756c5125e3ee79c
126 Risk Score

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 0.9961

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://dafemum.ru/award?keyword=bicol+language+pdf PDF link annotation
    • http://werojati.getenjoyment.net/12080481451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488135/normal_6030032684821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444643/normal_6056378413767.pdfIn PDF document text
    • http://wojisub.mypressonline.com/ginamako.pdfIn PDF document text
    • http://fajamad.mypressonline.com/shipping_agency_company_profile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422908/normal_60430f6ed1393.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369518/normal_5feb987d81c62.pdfIn PDF document text
    • http://kujinatazema.sportsontheweb.net/definition_of_teamwork_in_the_workplace.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/what_happens_when_your_blood_pressure_is_high_during_pregnancy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_cd6cfa02eec94cc1b1f90e5063de5b4c.pdf?index=trueIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_dee67b55a2d24e02aeaf1db5650bc71a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e844b3c-04a1-4bc4-b9b4-494a9316838e/wuledobasanilujezigirupa.pdfIn PDF document text
    • https://12c9c681-cafc-4f88-93da-cb6f471fd49a.filesusr.com/ugd/f09a9d_69fb08c8aa4d4b2bb47b2d6b22930811.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kaxukok/school_report_writing_samples.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/89825431353.pdfIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_b5059acff3b7433bb62f039ce65b2fc7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/manualidades_de_navidad_con_cds_reciclados.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e4c96f8-e8d7-41bb-ad3d-2042d058b79a/ninalovixededenuzuwisi.pdfIn PDF document text
    • https://bf2b7b75-7790-49a7-81e6-d2546e692b42.filesusr.com/ugd/8ccf63_f728db3fa8c843efa4fe636f1d570215.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/52348eef-1bea-46af-923f-5280617a7e3d/essentials_of_computer_organization_and_architecture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f1782e-bd63-4b22-8f7e-ac21ad454383/how_to_draw_a_flower_step_by_step_realistic.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/lightroom_video_editing_free.pdfIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_d4b960bfd5424886bbf103ce51643e06.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47f04a2-5f0a-4b39-b5a6-2b529b404ae3/17986138091.pdfIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_e896f2e2373a4713910b1b0b8e23aeed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/buwosevax/46030635904.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_off00010e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E53 5096 bytes
SHA-256: cd5cbdd1b5df0b10671df470b9f00d797f32925bece850e9e64011bb7cbf0b0b
font_01_sfnt_off00011fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC6 15112 bytes
SHA-256: f2e21ced0b147c451808053d2bc5457cacad650e5eea37a657104405b2625b79