Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1e19cd4229ae59…

MALICIOUS

PDF

81.8 KB Created: 2021-03-14 04:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 09c57e3a61c696e8eb769bf916f9d610 SHA-1: b0c7d784c935667ece739aac8623cd19a4be30b8 SHA-256: 2b1e19cd4229ae59ad33e3b09413ed59324b3ad2fc65b2e267e2205a5ffffc4c
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several pointing to domains flagged as link farms on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or redirecting users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/award?keyword=cape+town+suburbs+map+pdf PDF link annotation
    • http://zotikarida.medianewsonline.com/biologia_celular_y_molecular_de_robertis.pdfIn PDF document text
    • http://cabinetshub.xyz/naporazososexezatizemiar65.pdfIn PDF document text
    • http://gimatadokij.mygamesonline.org/oral-b_1000_vs_1500_vs_3000.pdfIn PDF document text
    • http://rezumitisud.mygamesonline.org/how_to_name_covalent_compounds_with_three_elements.pdfIn PDF document text
    • http://rating-bookmaker.ru/80615282113tstrj.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/how_many_treasures_have_been_found_from_the_secret.pdfIn PDF document text
    • http://bettermoneytips.com/masukejajebepor31mw4.pdfIn PDF document text
    • http://liberum.sportsontheweb.net/tumofixebapefidanefagipi.pdfIn PDF document text
    • http://raifaisentgo.online/dorupujewuroreloriwicrjry.pdfIn PDF document text
    • http://nanamojuvimujo.medianewsonline.com/what_are_positive_psychological_interventions.pdfIn PDF document text
    • http://bigowet.xyz/616928487806er3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://setovoj.onlinewebshop.net/romowedopedira.pdfIn PDF document text
    • http://muvipej.atwebpages.com/cesur_yeni_dnya_turuz.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/40_rules_of_love_book_amazon.pdfIn PDF document text
    • http://fowimifefezujo.myartsonline.com/gastritis_eritematosa_universal.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/xowava.pdfIn PDF document text
    • http://dezinolabebosod.atwebpages.com/jack_lalanne_power_juicer_express_cleaning.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/open_in_new_window_blocked_by_browsermake.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/shareholder_activism_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/history_of_byzantine_architecture.pdfIn PDF document text
    • http://vedixemalirugi.atwebpages.com/meaning_and_scope_of_social_anthropology.pdfIn PDF document text
    • http://zevusup.atwebpages.com/multiple_intelligences_gardner.pdfIn PDF document text
    • http://kijonag.onlinewebshop.net/24505432317.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/wazegoxivaxewux.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_off00010070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10070 5292 bytes
SHA-256: 5f77c8e7880738b4150883be97b33d77d1cf359bc6825228158450a8a73e603e
font_01_sfnt_off0001125f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125F 11216 bytes
SHA-256: 0838453bbfaad8df33f95280b16c8d06e97fc976e6770e6203db787651763af3

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