Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c799d264f8ba5d…

MALICIOUS

PDF

88.8 KB Created: 2021-04-16 17:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0084fb2990d1bfd1f52b8dede69ca22d SHA-1: bc8bb3ce79d307b51a015183f65e57cbe3a7f5b5 SHA-256: c0c799d264f8ba5d27863f3c6ee0aea64529b20de1e9df242b9e7a582e38d3d1
66 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to suspicious domains, with one specifically mentioning 'navy recruitment' as a lure. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URIs suggests an attempt to redirect the user to a malicious site for further exploitation. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 4

  • 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://soxebez.ru/strik?utm_term=how+to+apply+for+navy+recruitment PDF link annotation
    • http://natlegend.space/puxavuzinzea4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_60370cad900c0.pdfIn PDF document text
    • http://fherixq.com/love_to_draw_manga_gacha_life52fta.pdfIn PDF document text
    • http://lightstart.xyz/23893562310vuw4w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479222/normal_5ffc7172a7280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460946/normal_60638d348fe8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_601f9db1615b6.pdfIn PDF document text
    • http://jnatural.space/mufekosewono1dipp.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/how_do_i_watch_twilight_on_netflix.pdfIn PDF document text
    • http://ighelpcenter.xyz/130970823978jtde.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/66127596849.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486763/normal_5fdf9e8f9491a.pdfIn PDF document text
    • http://mifvideo.space/79503456732wrff1.pdfIn PDF document text
    • http://stav-games.ru/how_much_is_housing_at_san_francisco_state_universityss3ra.pdfIn PDF document text
    • http://heleogose.online/vidmate_apk_free_9appsb0rr1.pdfIn PDF document text
    • http://nat-fru.space/ip_man_3_download_in_tamil_dubbed8h8t7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b7f5b04e-b247-49a4-9dc0-39f0c843ec09.filesusr.com/ugd/b56f86_911454eb4c974cab82719b6dce63bff8.pdf?index=trueIn PDF document text
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_b83dca38c0f649789caea1f72e11d64b.pdf?index=trueIn PDF document text
    • http://samesesodore.onlinewebshop.net/tipo_de_comunicaciones_en_una_empresa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56287fe7-28a5-4eac-8390-eb0775c26a94/wejomipedo.pdfIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_85ff6cf3000246e78c83fa6896d7690a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ca011fe-e1c0-49b7-a3d7-6c8ed83ec1dd/94320716808.pdfIn PDF document text
    • http://sijadogif.atwebpages.com/parenting_capacity_assessment_questionnaire.pdfIn PDF document text
    • http://semowomeso.onlinewebshop.net/84033428236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/895fe6e4-4ed3-44b2-8af2-c2fcbb7ef4bd/43882278884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcaccee8-bf9b-4721-a611-aafa7abe0846/fofesatironojigelef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c8d08fa-6708-4781-8e51-26c523d240b8/el_reino_de_este_mundo.pdfIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_e6244abad13c414ead41fa3db4853327.pdf?index=trueIn 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_off00011d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D50 5200 bytes
SHA-256: d40300b06f2647cb19e50a44d431460a8d79aee6a4a99786dde70efcc7267299
font_01_sfnt_off00012f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0B 11156 bytes
SHA-256: 5401909b5038a89fa1e9c3d0f80d8ad6967bc044ade9944f46842bb72c58e863