Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62c15c4cbee8405…

MALICIOUS

PDF

71.3 KB Created: 2021-04-11 08:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e3712b8ffad83124f0b6bf5136f041a3 SHA-1: ec61ed5a25fed0e5b4168d706fd0c105ca124d50 SHA-256: f62c15c4cbee840528086240f679aff786972c5d4375f861655aca0fa2265eaf
134 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to this behavior, and the presence of a 'download button' lure further supports a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=what+is+acura+b1+service PDF link annotation
    • http://sosyaltakipcipanelin.com/90032502090tspjq.pdfIn PDF document text
    • http://winatesef.sportsontheweb.net/c_est_ou_il_est.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/87005699714.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/renewable_energy_sources_nptel.pdfIn PDF document text
    • https://fizinizaboz.weebly.com/uploads/1/3/5/3/135304720/f5dcb986cbb6045.pdfIn PDF document text
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/8803891.pdfIn PDF document text
    • http://ropibolexi.iblogger.org/lewajupuzifamadodi.pdfIn PDF document text
    • http://alteramaks.world/91163908813bda3t.pdfIn PDF document text
    • http://nukadaz.iblogger.org/bollywood_full_movies_filmyzilla.pdfIn PDF document text
    • https://gabubogoko.weebly.com/uploads/1/3/3/9/133997439/2526848.pdfIn PDF document text
    • http://shopyou.online/categories_gramaticals_exercicis_primariahhdtn.pdfIn PDF document text
    • http://romeita.space/what_subjects_do_you_need_to_study_electrical_engineeringbehce.pdfIn PDF document text
    • http://wepovak.iblogger.org/89229633725.pdfIn PDF document text
    • http://itprod.space/pik_nuksan_bharpai_form_downloadueb03.pdfIn PDF document text
    • https://reragoposezexel.weebly.com/uploads/1/3/5/9/135958934/xasatova.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lejaxofin.epizy.com/map_reading_skills_worksheets.pdfIn PDF document text
    • http://tereralubo.epizy.com/battlefield_4_xbox_one_digital_code.pdfIn PDF document text
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_dc4fefb109c14f488d903e2602089791.pdf?index=trueIn PDF document text
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_a7c3f6bdca7c4e04bdae268382db9789.pdf?index=trueIn PDF document text
    • http://korofituzuxigu.onlinewebshop.net/cryptocurrency_for_beginners_free_download.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_87fd81f32a94406fb55f147b3b34cf98.pdf?index=trueIn PDF document text
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_d703e26670fa4a92bfc51cb20c05fe3a.pdf?index=trueIn PDF document text
    • https://a943cdc4-551e-4fd6-8842-bb1c82e441e2.filesusr.com/ugd/a0303e_538a7fa5d7204cb8a36f9395b1abc076.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_off0000d8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D5 5120 bytes
SHA-256: 99f652a8a22b6fb12bfd9b254f9ca8f98b76f9b2f4d92beefb6419048a5c1aba
font_01_sfnt_off0000ea53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA53 10592 bytes
SHA-256: c12215179d421b5bb7271d528336a48880d3dcb588038124daa1d6f5e1788be5

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