Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f6806a8d6333b7…

MALICIOUS

PDF

81.8 KB Created: 2021-03-22 14:57:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7ac3a0052bbbad3495f6200ee8d53a24 SHA-1: 1da973fe87f84c580c38eff6124e5409b04601ba SHA-256: 95f6806a8d6333b79ecca63312e0034a81a1dcbff0d4660173e9c972ba68c37e
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/aws?utm_term=comparing+fractions+worksheet+6th+grade PDF link annotation
    • http://kekemubitaf.iblogger.org/raees_bacha_audio_songs_free.pdfIn PDF document text
    • http://rovepofaji.22web.org/88677735774.pdfIn PDF document text
    • http://xiravudes.22web.org/tunutajatinusewak.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/2043430358.pdfIn PDF document text
    • http://durowan.sportsontheweb.net/81457342662.pdfIn PDF document text
    • http://kartaidatodemeleri.com/boxhead_vs_zombies_unblocked5837o.pdfIn PDF document text
    • http://rastet-malysh.ru/rawovijisejagadiiuim0.pdfIn PDF document text
    • http://eurozone.pro/sony_fm_am_clock_radio_icf-c11ip_manual9c1r3.pdfIn PDF document text
    • http://dixojele.22web.org/74971458234.pdfIn PDF document text
    • http://brosbass.com/lemukuwiwewamr1i7i.pdfIn PDF document text
    • http://pedagodogiko.getenjoyment.net/77314966682.pdfIn PDF document text
    • http://wemamenanimodi.22web.org/88276418451.pdfIn PDF document text
    • http://rezexepenoma.scienceontheweb.net/medical_leave_application_format.pdfIn PDF document text
    • http://mezunirobuf.22web.org/2nd_conditional_worksheet.pdfIn PDF document text
    • http://goodshopsales.xyz/what_is_a_remote_collar_for_dogseabjf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jojisoxig.epizy.com/35991187705.pdfIn PDF document text
    • http://rofijig.rf.gd/fazanizabiponik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/486a6bfe-fe62-43e1-887a-909902d962ea/free_download_twilight_full_movie_in_hindi.pdfIn PDF document text
    • http://laletowizoz.epizy.com/fluval_306_external_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc65fb3b-d411-4ff1-a0f3-69e069261593/how_to_record_message_on_uniden_phone.pdfIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/analytic_geometry_circle_problems_with_solutions.pdfIn PDF document text
    • http://bekapoza.epizy.com/airflow_icon_30_manual.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_off0000feef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEF 5752 bytes
SHA-256: 90bdcf5b606a90145aa777a3feb60d16feeb7b11f62f631724b0e6fe4b767da8
font_01_sfnt_off00011267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11267 10988 bytes
SHA-256: 830e3042438d2e87791b0c72a515415cc6f04e7fc3f6100f6afd05026f0c228b

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