Malicious PDF — malware analysis report

Static analysis result for SHA-256 660a944208c60078…

MALICIOUS

PDF

78.5 KB Created: 2021-03-18 15:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 99291e87770b4143cc03de5534264527 SHA-1: 71618f4e6f36bc536e91becaee005070ebdf690f SHA-256: 660a944208c6007833c742f5bccfb69e53147f519bf4b254eeec9c3fb0bb9cfb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware download sites. No scripts were extracted, but the PDF structure and URL analysis point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=aiag+vda+fmea+handbook+1st+edition+2020+pdf PDF link annotation
    • http://kengoru.space/myasthenia_gravis_adalahpkfie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_6036800eb9a6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_60484810edb9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490264/normal_603ea7e3c8c2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426424/normal_5fcc81360e8c9.pdfIn PDF document text
    • http://crispyset.online/371679798038jbea.pdfIn PDF document text
    • http://creditreportus.info/nopijuzexeganezen3.pdfIn PDF document text
    • http://trudogoliya.online/pro_series_drag_racing_pro_street_mustang_tune0mjdi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5fd2c64770b24.pdfIn PDF document text
    • http://weinmvc.net/dewalt_table_saw_dw745_zero_clearance_insertjt2gk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tiniruru/lakhmir_singh_manjit_kaur_class_10_physics_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26d5d4e-0b76-42c5-a0fb-4ac292184bc1/why_is_my_hp_4500_printer_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d2e47d4-ec63-43fd-95dd-a44d82c424ec/the_republic_lubbock_bus_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/litajobadirowa.pdfIn PDF document text
    • http://setiwifuv.rf.gd/17537227779.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/97681598241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b0f957-3506-4924-9012-eecdcdf57ed6/vukedisinemivejevexedix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf11c4b-4474-40eb-8d2a-eee2d90b82c9/xatuxupo.pdfIn PDF document text
    • http://zuriromaruwo.epizy.com/46780991454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59dccb01-efca-485a-8bb6-870bfe9d20fe/gabriels_redemption_full_movie_123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b228860-1bfb-4a66-b367-e0ed6de4e7c8/the_wild_unknown_tarot_deck_and_guidebook_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ecf864-7245-4156-b5b7-0118bfbbadfa/air_force_one_love_letter_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89dfca06-308c-408d-8634-3bb4afd8c546/is_photography_really_art.pdfIn PDF document text
    • http://gavonita.epizy.com/windows_command_list_files_recursively.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_off0000eeef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEF 5908 bytes
SHA-256: 68504dd2c2a5698a34d54043f49650296a778f10b8d884e3cf9f41424d76665a
font_01_sfnt_off000102f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F6 12220 bytes
SHA-256: 1efe7e959e980a1b7ef85faafec28e917bbdf1c11e2a53fa595aa11c1fe82c39