Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf58e1c7f3fe31f…

MALICIOUS

PDF

76.6 KB Created: 2021-03-21 23:40:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41a424756ed02ab25803e979db96547b SHA-1: 6ed7608a74ae6e63adff1f91e4ce33e9c46e4401 SHA-256: adf58e1c7f3fe31f322d32f0d122f7e35385584bfa29a97c7fe704cf8bbc0aa7
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links to disposable domains, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to lead users to malicious content.

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://mezovuduw.ru/wix?keyword=relation+between+state+and+national+government
    • https://static.s123-cdn-static.com/uploads/4460241/normal_5feb1b23d72b5.pdf
    • https://rixeludabigadak.weebly.com/uploads/1/3/0/9/130969597/wifotizexubid-jawof-putenu-bifaxoxam.pdf
    • https://cdn-cms.f-static.net/uploads/4456140/normal_6020c0e01e035.pdf
    • http://sexesex.site/mcdonalds_application_form_canadakjr85.pdf
    • http://jiteruruw.sportsontheweb.net/72820884630.pdf
    • http://evatopshop.xyz/reading_celsius_and_fahrenheit_worksheets991cq.pdf
    • https://wubuzafovotul.weebly.com/uploads/1/3/0/8/130814439/5523629.pdf
    • http://conicppjry.bid/what_is_the_weather_for_washington_dc_tomorrowwbxwe.pdf
    • https://pesawuzopedeg.weebly.com/uploads/1/3/5/3/135327269/zetaz.pdf
    • http://copyrighthelpptteam.com/conjunctive_adverbs_list_and_their_meanings4jlqq.pdf
    • https://cdn-cms.f-static.net/uploads/4366005/normal_604d3f256ccb9.pdf
    • http://lbaranaydin.com/prestige_sandwich_maker_with_removable_plateswgcvb.pdf
    • https://cdn-cms.f-static.net/uploads/4459926/normal_601b7f8fdbc5a.pdf
    • http://gejokakop.mygamesonline.org/bearing_number_identification.pdf
    • https://budojidotepaso.weebly.com/uploads/1/3/5/3/135312143/wekefirudimuxer_tovodadopa.pdf
    • http://fejukoturig.medianewsonline.com/ifsw_statement_of_ethical_principles.pdf
    • http://boost-store.net/hakuouki_anime_english_dub_episode_302xzo.pdf
    • https://static.s123-cdn-static.com/uploads/4449629/normal_5ffff8f4daff1.pdf
    • http://dapurixid.sportsontheweb.net/focusrite_saffire_pro_40_driver_windows_10.pdf
    • http://kernig.pro/planes_controlados_telceljc492.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wofavum.myartsonline.com/narrative_analysis_research_example.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec3.bin
60be8e1d15d463f1b598a6a608114f4139d61d6b6fe385e54958874545fa3b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 5444 bytes
font_01_sfnt_off0001014c.bin
f3d4367ec39ba231c0d397e957d83fb504ca50f27a08c25cae60b8d02566222b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1014C 10508 bytes

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