Malicious PDF — malware analysis report

Static analysis result for SHA-256 047a6d1c7721a711…

MALICIOUS

PDF

77.5 KB Created: 2021-03-15 16:25:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f3f8d37a9e604c746b29c268d942bc08 SHA-1: bdfb314402ecfa505a35a0d3a3d57a6e0f2b0888 SHA-256: 047a6d1c7721a7118ac44de81f9a2f716e09b652dfcdac9f11f6b2d841b83aa5
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 0.9999

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://pelibifir.ru/award?keyword=cameroon+history+since+1960+pdf PDF link annotation
    • http://mimivamefigupe.sportsontheweb.net/how_much_does_it_cost_to_fix_a_hp_chromebook_screen.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/xopevofalavix.pdfIn PDF document text
    • http://kodutizaga.mywebcommunity.org/basic_conversation_exercises.pdfIn PDF document text
    • http://xelamoxadavas.mywebcommunity.org/best_restorative_yoga_poses_for_back_pain.pdfIn PDF document text
    • https://cdn.sqhk.co/papebikuwi/imjidge/17143319264.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/1_to_1000_in_english_words_excel.pdfIn PDF document text
    • http://gojevomarokabe.getenjoyment.net/stanley_wet_dry_vac_4_gallon_bags.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/gk9kEje/get_lucky_meaning_in_tagalog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_6c87328ecb614744b95630389f94e6f3.pdf?index=trueIn PDF document text
    • http://zewogukanonudut.epizy.com/arrl_antenna_book_23nd_edition.pdfIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_248bdbbe941d4d8e91a946a9abfd3479.pdf?index=trueIn PDF document text
    • http://fobexegedun.epizy.com/campbell_hausfeld_powerpal_air_compressor_1_2_hp.pdfIn PDF document text
    • http://roniwixanedif.epizy.com/79591527272.pdfIn PDF document text
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_b5ed5feadcb74cbfb52ae79d9b794d02.pdf?index=trueIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_2c29b24fb7464a00a1154debc92b6147.pdf?index=trueIn PDF document text
    • http://jutoxuriwiloja.epizy.com/house_of_night_otherworld.pdfIn PDF document text
    • http://wepogevadapafa.atwebpages.com/vogalegon.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/map_of_asia_quiz.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_off0000eee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE1 5872 bytes
SHA-256: bc6c2ac9e9983f66259b721331ca33253ec6f0aa2381d1d09e277e268d9b758b
font_01_sfnt_off000102b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B5 10704 bytes
SHA-256: 9da1a5141fdbc6e0876ec83b5af8e3c74f908283b45155e000ffc32f883084af

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