Malicious PDF — malware analysis report

Static analysis result for SHA-256 653962472eec215c…

MALICIOUS

PDF

83.9 KB Created: 2021-03-21 21:01:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fd5f79ddce74c793b36952cc1771dcb3 SHA-1: 88e3a9bb92c4299cce9b685af42370a142c6d447 SHA-256: 653962472eec215c07bfc760be78d2aae1566a9a3587974a994337e7352cd8e8
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 0.9998

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://mezovuduw.ru/strik?utm_term=how+to+play+21+cards+with+2+players PDF link annotation
    • http://xenakasewexibal.sportsontheweb.net/blue_eyes_technology_seminar.pdfIn PDF document text
    • http://roxedizusugu.mywebcommunity.org/how_to_install_a_fantastic_fan.pdfIn PDF document text
    • https://cdn.sqhk.co/sarafogu/9gigzbS/how_to_keep_mosquitoes_away_at_night_indoors.pdfIn PDF document text
    • https://cdn.sqhk.co/wavagowew/jbiaji8/360848324.pdfIn PDF document text
    • http://cabinetsly.xyz/the_boy_who_harnessed_the_wind_trailer_deutschu4b3t.pdfIn PDF document text
    • http://zabavnyi-slon.ru/1211157594upjvw.pdfIn PDF document text
    • http://itravelgr.com/medoketavonitipazeletarofkbz1z.pdfIn PDF document text
    • http://meetplafond.xyz/46853167286oxyyt.pdfIn PDF document text
    • http://gaximivotekole.mypressonline.com/stihl_fs_55_rc_price.pdfIn PDF document text
    • http://daddytestit.xyz/real_steel_world_robot_boxing_game_download_uptodownwti3l.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/kogopopulubokobakug.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/0gegf7d/7314284823.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/dhihaGP/my_talking_tom_2_android_gameplay_ep_2.pdfIn PDF document text
    • http://zavulibalox.mypressonline.com/birth_asphyxia_download.pdfIn PDF document text
    • http://scandisvet.ru/bernina_1230_reviewhw7u4.pdfIn PDF document text
    • http://raxawevamavox.getenjoyment.net/bugupoborugadapi.pdfIn PDF document text
    • http://comp-arenda.site/ectomorph_home_workout_plan1l7dy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ginowane.onlinewebshop.net/mapa_do_brasil_estados_e_cidades.pdfIn PDF document text
    • https://a96990da-dd17-4b11-844c-aba2d588d1b6.filesusr.com/ugd/5e5e7b_895fabfe59394feaa3e943a3aa85f0ea.pdf?index=trueIn PDF document text
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_d82b03499ce546379682a7ecfc24edfd.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_off000108bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BF 5500 bytes
SHA-256: 3ebb650e780a22661c6076a0550132e55f9a68d7fdf06179a5968a6789da2f89
font_01_sfnt_off00011b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B89 11036 bytes
SHA-256: e5874cdd34e2ea9d2dbb46b51c01acd8dff6d4a809bc3fc9d3482fe8bbc6ab72

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