Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a1f3a50cf4003f…

MALICIOUS

PDF

71.3 KB Created: 2021-02-21 15:12:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9af5d0d86b08e49aaa758346706f6a95 SHA-1: cd1da58015e65e4630a100140b0b88d366b3d037 SHA-256: 83a1f3a50cf4003f9f2222913eccd77b1b01b4c7a8f651a998e23f1621cb7bd1
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://crophysi.ru/wix?keyword=vlogger+go+viral+apk+mod+2020 In PDF document text
    • http://netewe5.xyz/real_estate_broker_license_florida_schoolswfxgw.pdfIn PDF document text
    • https://cdn.sqhk.co/povewepalu/higeqjc/rider_waite_tarot_meanings_download.pdfIn PDF document text
    • http://antinomi.design/2129337947260mpo.pdfIn PDF document text
    • https://cdn.sqhk.co/nizekidido/jj9Jzhg/51201896756.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/gijby2j/castle_of_illusion_sega_mega_drive.pdfIn PDF document text
    • https://cdn.sqhk.co/zowesifona/aUx2Vja/regal_cinema_16_dollar_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/ficjdbH/22417702066.pdfIn PDF document text
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/1298273.pdfIn PDF document text
    • https://kasewipiliri.weebly.com/uploads/1/3/4/9/134901701/5135138.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/pjciejj/good_messages_heart_broken.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/hctxqgg/daily_agenda_app_iphone.pdfIn PDF document text
    • http://bet-info.ru/phenolic_resin_cotton_sheeteqml2.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/cjchhXB/loyalty_for_love_romance_you_choose_mod.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/7133686.pdfIn PDF document text
    • https://xesofizagib.weebly.com/uploads/1/3/4/4/134491847/6a39d805b.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/GjfwyJq/warby_parker_insurance_unitedhealthcare.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/HhdTPjh/jozemapugulibexasitukele.pdfIn PDF document text
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/bc942890edb1a54.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/gcjaRv5/lisibaxupubasig.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/jotogorurekuro/92516559634.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/oxford_dictionary_english_to_nepali.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/sewawozu.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_off0000d982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD982 5464 bytes
SHA-256: 3f64f7617e8ef85d672035e6f9918cf604da5d1e9300b06a10f69b689e7b9be4
font_01_sfnt_off0000ec12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 10412 bytes
SHA-256: 2c120f262b3ca2c53e79f50abc5f47c4c170e9d9d0e1f8dbc89aaf9d21e7c80f