Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e2a28e60678c42…

MALICIOUS

PDF

99.8 KB Created: 2021-03-18 01:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dd20553138a18479f62ad19127c06619 SHA-1: c5196075a2ffa4e2423b45e80bc8a7c01da6cc31 SHA-256: b6e2a28e60678c42da7185ea594ed87e50e6a7970a6d6d41bec3ea7794d68170
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9997

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://dugedepap.ru/award?keyword=emerging+approaches+to+leadership+pdf PDF link annotation
    • https://cdn.sqhk.co/fowurona/jbib27r/labuniketado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494891/normal_60171955e2096.pdfIn PDF document text
    • http://tosijamap.iblogger.org/dyson_v7_trigger_operating_manual.pdfIn PDF document text
    • http://xunawuloraxoru.22web.org/how_many_ounces_in_a_large_dunkin_donuts_hot_coffee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455390/normal_5ffe878e65a2c.pdfIn PDF document text
    • https://cdn.sqhk.co/boxoveru/hdjjhhj/cartoon_wallpaper_hd_for_mobile_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tiluzegata/fGFSCag/forklift_daily_checklist.pdfIn PDF document text
    • https://cdn.sqhk.co/pedagukar/jewnigY/26654832786.pdfIn PDF document text
    • http://jitaguzo.22web.org/esl_body_parts_exercises.pdfIn PDF document text
    • http://solerizimifo.iblogger.org/7661639888.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379053/normal_5ff518958f870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_6009ef78b8ae5.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/9C6jb13/shark_ion_f80_multiflex_target.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/jjKicic/lunar_battlegrounds_d2_ghost.pdfIn PDF document text
    • http://kexopef.iblogger.org/wijal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rexamif.epizy.com/julian_date_calendar_2020_excel.pdfIn PDF document text
    • http://lanotiwigizoxep.epizy.com/tudofikebuvinilowovoxide.pdfIn PDF document text
    • http://tilixufevoj.epizy.com/64926216730.pdfIn PDF document text
    • http://loviwinirapam.rf.gd/best_video_calling_software_for_pc.pdfIn PDF document text
    • http://xafenala.epizy.com/mental_ability_test_questions_with_answers_for_class_4.pdfIn PDF document text
    • http://situbepid.epizy.com/switch_games_codes.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_off0001483a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1483A 5524 bytes
SHA-256: 13f2b296ab95a1715ed687972b8a877ad83eba8ad588d9fa0b8f6024d23e483e
font_01_sfnt_off00015adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ADF 11144 bytes
SHA-256: ee986a9cb5dbbb7f0c8e64ae3e7d384713f392eda919bd91cf8d5478c0bb876f