Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebc2398328a7e43…

MALICIOUS

PDF

77.6 KB Created: 2021-04-08 03:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9678c77e302c3845390b4dc94223811b SHA-1: 88d2264ec5dc9a91fc7bfca71350f493273e0413 SHA-256: bebc2398328a7e431519ab07eb7255b3f59ab36f99f667f7271d6f259cb79280
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 0.9998

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://pelibifir.ru/wix?keyword=forms+of+government+lesson+plan PDF link annotation
    • http://vovpomnim.ru/sat_math_practice_test_3_no_calculator_answersoofyb.pdfIn PDF document text
    • http://wanezus.scienceontheweb.net/age_of_empires_3_strategy_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/jirYigU/falling_waters_trail_mt_lafayette.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/idNjLhc/71039397101.pdfIn PDF document text
    • http://autolombardpro.ru/565343821543tq0t.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/jgEjdR9/larukivex.pdfIn PDF document text
    • http://storeeu.info/suddenly_seventeen_eng_sub39kq9.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/3Z3olbT/vibabu.pdfIn PDF document text
    • http://pubgmobiie.com/how_to_make_a_working_clock_for_school_projectpdbqu.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/hiP2tog/cnc_router_machine_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/dIsijjh/network_marketing_books_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/jimerhd/hospital_grade_power_cord_14_awg.pdfIn PDF document text
    • http://goossyy.online/what_is_set_relation_and_functionwk19s.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/gazijewevan/sushma_swaraj_images.pdfIn PDF document text
    • http://benamow.myartsonline.com/kapirijefedebaxutedowufa.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/seloxuk.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/halloween_word_search_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/bernie_madoff_scandal_summary.pdfIn PDF document text
    • http://wozitoso.atwebpages.com/vuvuveju.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_off0000f294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF294 5236 bytes
SHA-256: ebd27b7d734a658dbaa8de3f354633327d5d788bc965babf9a07721e34b721cb
font_01_sfnt_off0001045b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045B 10820 bytes
SHA-256: 7ab5b94fad2707c1bae877c736c44b51a8c9d099a79bb02185fc2584c8c40b32

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