Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7622991385ef602…

MALICIOUS

PDF

78.8 KB Created: 2021-03-14 17:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 97ee54674da1d6b109d5f73955bef211 SHA-1: 5976a5c865760beb6ee95fa1dd6722ae4d7c22cd SHA-256: a7622991385ef6025cadd42249460d85cfc14d795608206fe4094dfe3040ed93
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://xajibur.ru/strik?utm_term=xbox+one+controller+wireless+pc+setup', is flagged as suspicious and likely leads to a phishing or malware distribution site. Heuristics indicate the PDF is a link farm on disposable hosting, and ML classifiers and ClamAV strongly suggest malicious intent, specifically phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=xbox+one+controller+wireless+pc+setup PDF link annotation
    • http://berkeciftci.net/calculus_art_of_problem_solvingforqr.pdfIn PDF document text
    • http://productwood.ru/427852303778tnhf.pdfIn PDF document text
    • http://likelid.xyz/biedermann_und_die_brandstifter_interpretationtcnzt.pdfIn PDF document text
    • http://topcreditcheck.info/22595307441y2rpc.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/what_does_a_large_sweet_potato_look_like.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/xudadizagivojaxoporulawi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/welanisowari/aws_cloudformation_template_lambda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/459cf8f1-fcf5-48f1-bd4e-2a0dc87b215f/ejemplos_de_diagramas_de_flujo_para_programacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e784c69f-2bb2-4a64-a17f-e8526d60dcaa/trade_like_a_stock_market_wizard_epub_vk.pdfIn PDF document text
    • http://dovixuti.rf.gd/how_to_install_a_furnace_filter_whistle.pdfIn PDF document text
    • http://vidobif.epizy.com/brahm_kavach_path.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2392c2b9-180a-4279-8b23-74a8af2a96d9/in_what_order_should_you_read_sherlock_holmes.pdfIn PDF document text
    • http://tilojer.epizy.com/cdc_immunization_schedule_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/black_wallpapers_for_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fef2856e-3266-42c2-ac16-732a53c9621f/56343726871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8f766e-ed35-4e70-b777-1b03613652ec/tusadupemum.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/hayes_school_publishing_co_worksheets_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/69827723530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c0cb2e-42d1-4255-8ee5-63f60efd8fc4/best_logo_design_software_for_pc_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/bofakozuzisemuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962ae6fd-0939-4b15-8f6f-6722e6a0f755/hp_laserjet_m1212nf_mfp_review.pdfIn PDF document text
    • http://woxowezev.rf.gd/letter_copying_sheets.pdfIn PDF document text
    • http://pixafur.atwebpages.com/chapter_viii_first_stage_of_the_revolution.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_off0000f7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BB 4996 bytes
SHA-256: 71b836837b333785bc56f5b31c86d35b9b9168643eb4403cb9741ef77c29c997
font_01_sfnt_off000108d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D7 10760 bytes
SHA-256: 837b20798d3711799a8632964ae6b6f1a7147f496bbf69aaea7f26e60f284a9c

Open this report in the interactive analyzer, or submit your own file for analysis.