Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e53b563e1ad415…

MALICIOUS

PDF

76.0 KB Created: 2021-02-20 01:19:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4d06528982c59a4767439d2378c9edd6 SHA-1: 985a3ca5777808e03f3dd6b941128e985e91247f SHA-256: e2e53b563e1ad41520e17c2bf415a2c5e549b9e3c9b14a573b8dd8df8bcf762f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

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://jottigo.ru/wix?keyword=ccsf+math+placement PDF link annotation
    • http://gilitomenuxame.22web.org/palmistry_free_book.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/NyijXGv/grass_cutter_machine_repair_shop_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/jc44TSx/pico_rivera_weather_air_quality.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/99YNwBX/zanozotukuwakajajamu.pdfIn PDF document text
    • http://xuwajofona.iblogger.org/vehicle_registration_transfer_form.pdfIn PDF document text
    • http://detonicufficiale.website/latest_football_transfer_news_bleacher_report2jum1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386081/normal_6002a1eea472e.pdfIn PDF document text
    • http://fivabigenarewo.22web.org/93744828871.pdfIn PDF document text
    • http://hookup753.fun/970446060695kbhy.pdfIn PDF document text
    • https://cdn.sqhk.co/mimizajig/1Whejhy/48197729162.pdfIn PDF document text
    • http://train-home.ru/furufagonodapaxotozgqdn.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/qTj4jb2/zojulokag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gukupexokopiwug.epizy.com/5869136148.pdfIn PDF document text
    • http://rirusivinudi.rf.gd/bubbleupnp_android_anleitung.pdfIn PDF document text
    • http://buwumipulufi.epizy.com/18560812751.pdfIn PDF document text
    • http://zoniguzetixan.epizy.com/vifude.pdfIn PDF document text
    • http://ladugokifuwub.rf.gd/odia_song_new_2019_video.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_off0000ede5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE5 5064 bytes
SHA-256: 488cdfed7d740ea16ea29cde2305afef8635c76843e0f4f7ef24c00195f974fb
font_01_sfnt_off0000fefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFA 10704 bytes
SHA-256: 75cfc9e46d6757cdbf42b15df5cefb1c9c57210d50380a17a2e91615ccf3b0f9

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