Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0098f9e3b746e28…

MALICIOUS

PDF

84.6 KB Created: 2021-03-14 11:20:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3a441bdd70ce78fd6e8aed6eb9b1f87d SHA-1: f9aa761919bfc18f135c0fd002c7b2c3c32b1b00 SHA-256: a0098f9e3b746e28d93b111bd103a443c76dec5091cff37e219dc46e0d1114aa
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external URIs, including a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://gimoguvi.ru/123?utm_term=culture+and+sensitivity+report+mic PDF link annotation
    • http://return-0.com/peta_rute_trans_jakartatjlfq.pdfIn PDF document text
    • http://salestore.pro/fepegefoxeraversqzvh.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/nefedujofapututq9cg.pdfIn PDF document text
    • http://disclosures.space/descargar_libro_la_razon_de_estar_coxb7fr.pdfIn PDF document text
    • http://uniques.space/puzisugifosebinixuvuri42ykn.pdfIn PDF document text
    • https://cdn.sqhk.co/selodiro/ghdghid/robot_carnival_soundtrack.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/bsc4success_computer_mcq.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/taratazebigemorive41qn0.pdfIn PDF document text
    • http://milansit.space/kerelaruwoletojiwamezi9edgc.pdfIn PDF document text
    • https://cdn.sqhk.co/vidujubotaf/fw1itqn/80521183799.pdfIn PDF document text
    • http://wisecreditscore.info/rixenasefimp8zmb.pdfIn PDF document text
    • http://gupirigugorixuf.sportsontheweb.net/how_to_remove_quick_connect_hose.pdfIn PDF document text
    • https://cdn.sqhk.co/somujatiza/Bu5hegh/best_deet_free_insect_repellent_consumer_reports.pdfIn PDF document text
    • http://theporte.xyz/bovixowikokuvuviwewerur0rk3.pdfIn PDF document text
    • https://cdn.sqhk.co/felegabiw/jjQstjk/jajususaz.pdfIn PDF document text
    • http://help-copyrighteamservice.com/list_of_protein_rich_food_veg_in_indiaqzcyy.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/if_at_the_end_of_the_year_manufacturing_overhead_has_been_overapplied_it_means_that.pdfIn PDF document text
    • http://dusanaputojinon.mygamesonline.org/hamlet_by_william_shakespeare_analysis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/05fac966-a5b7-4026-8186-eb9a3fbf3684/simmons_rowen_crib_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/m_a_c_i_t_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/28900357145.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/good_for_nothing_junior_size_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e3c589-adc3-45b0-a0c6-b8574d1632d6/juposatudubodafumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed098bf0-78f9-4d02-8d22-e216979f21fc/meputaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab31619-5585-4d5c-99b5-9df0a2a62f8d/fidowimokirudonijene.pdfIn PDF document text
    • http://bepolujogox.atwebpages.com/sap_mm_stock_report_tcodes.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/play_school_drawing_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa5df15-c4d2-4a1d-b99d-5887a43bac11/how_to_get_rosetta_stone_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/keroteba.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF52 5284 bytes
SHA-256: c756609ef7ab28b3ebe77f678c7d54c35be7dfe8b79777270f119b257bad4736
font_01_sfnt_off0001113c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113C 11156 bytes
SHA-256: d6e3ffdda5073c0d5202e47590c03dc1b60ff008362d24beaf17b337d1bed9c0
font_02_sfnt_off00013662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13662 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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