Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5db190125873d59…

MALICIOUS

PDF

85.2 KB Created: 2021-04-19 18:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52a96c6e2ed33204e2df5e0cfba7f305 SHA-1: 471955f6c43c9d391b047bb1b0e2d7c7858600c6 SHA-256: e5db190125873d59d63206f075ae277b198503af0432a61aee4243cb2eb0d3bc
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to numerous external URLs, one of which is associated with a phishing lure. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=metro+last+light+artyom+death
    • http://teksalle.xyz/titanic_blame_crossword_answersdwpy8.pdf
    • https://cdn.sqhk.co/xanodujijefu/hbxia9H/hack_magic_twist_twister_music_ball_game.pdf
    • http://bluebadgeapproval.com/86902851705b0lgx.pdf
    • http://yesnutural.space/256560333938sash.pdf
    • http://itabody.space/organic_and_inorganic_compounds_examplesjiaoi.pdf
    • http://yesnutural.space/macit_gkberk_felsefe_tarihigg12u.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • https://cdn.sqhk.co/boremagu/fMLhgTI/lakowuwo.pdf
    • http://xbet1.fun/hp_p3015_fuser_gear_kitdx4s9.pdf
    • https://cdn.sqhk.co/kogeledewafo/1jgRodX/tuzugofemope.pdf
    • http://amsidgi.xyz/hematology_rodak_free_downloadnldk3.pdf
    • https://cdn.sqhk.co/woledibiroju/jeUMQOf/kiko_running_sushi.pdf
    • http://natur-bio.space/the_conquest_of_happiness_summaryc8gzy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://surifetopene.epizy.com/kunopuwegimepe.pdf
    • https://uploads.strikinglycdn.com/files/ace92c69-ae4e-4b1e-9884-e29aa5d564b3/math_art_activities_for_high_school_students.pdf
    • http://lejujafaroxe.rf.gd/cioran_anathemas_and_admirations.pdf
    • http://gobudulofi.rf.gd/tripura_cartoon_movie_in_tamil.pdf
    • https://uploads.strikinglycdn.com/files/8102090c-c17e-482e-9d66-b141d5abbc58/why_is_my_cuisinart_keurig_coffee_maker_leaking.pdf
    • https://uploads.strikinglycdn.com/files/cae4f5c6-fa2f-4632-a551-c609bf5e0dfc/soraluguged.pdf
    • http://fegegarovepib.epizy.com/41807624290.pdf
    • https://uploads.strikinglycdn.com/files/35516473-3ed3-47d9-af24-1a008ae42dd9/75630816392.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f48a.bin
870f111b8237279ecf3679f6183052fcef48bd43ab43b9d90fd730fe58717349		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF48A 5344 bytes
font_01_sfnt_off0001068a.bin
bdf74f6ed97c11ccfa446b6c68e72a3c01b1b169d2250a2090ff972d0867aad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1068A 8848 bytes
font_02_sfnt_off00011f00.bin
bb2854b03f6f4b99c1aff21117c309a700effee5b846d9648b31357a012e2011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F00 12132 bytes

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