Malicious PDF — malware analysis report

Static analysis result for SHA-256 8134cc0c47d931e4…

MALICIOUS

PDF

76.0 KB Created: 2021-03-18 12:59:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e3bf6383e636a2edc6e808d77d57461c SHA-1: 71cc3d85059b4f8ec76e8bfa78e798b9be0718cf SHA-256: 8134cc0c47d931e46fcc142f4d2db63a024e095e0642a49f25ea307ebdd523d4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/aws?utm_term=how+much+premarital+counseling+cost PDF link annotation
    • https://cdn.sqhk.co/zebenane/igegdEe/battery_day_tesla_2020_highlights.pdfIn PDF document text
    • http://letuxegesilem.iblogger.org/bojonanupimasobolikiso.pdfIn PDF document text
    • http://torevifij.iblogger.org/south_park_game_boy_color_rom.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/chocolate_black_and_tan_cream_red_miniature_dachshund_puppy_for_sale_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/AShdjnt/36664276054.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/para_que_sirve_la_moringa_con_guanabana.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sapakebozo.rf.gd/sentence_editing_worksheets_first_grade.pdfIn PDF document text
    • http://temomuduzuba.epizy.com/bangalore_days_bgm_zedge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06392d68-bfe2-484d-b8e8-73aa3c998977/brother_mfc_7860dw_manual_wireless_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8027524-79bd-4bf6-8d69-41e8716856ba/44510050529.pdfIn PDF document text
    • http://radalimufan.rf.gd/namil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8cf7a2f-514f-423a-8cdb-9e6d5464efa0/45405272699.pdfIn PDF document text
    • http://femodizabofowu.epizy.com/adobe_reader_dc_offline_installer_msi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c09dd268-a92e-41d8-bc8e-c91682e63361/trig_identities_practice_problems.pdfIn PDF document text
    • http://kipixuge.epizy.com/xopilimil.pdfIn PDF document text
    • http://sokurunofizune.rf.gd/91045471518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1145c7bf-39c0-49a6-b71b-df1c9c50f570/10301911201.pdfIn PDF document text
    • http://wowemipawugese.epizy.com/janapada_dj_songs_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27ef04e-63ee-4bfa-a3b0-58aa525624d6/drinking_quotes_coffee_mug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a4b5c70-ac1f-4c2d-8dd1-24e422ad8181/las_medias_de_los_flamencos_ministerio_de_educacin.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_off0000eb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 5400 bytes
SHA-256: c4648db05be0d36e977d8c7e5bd31bac15f2a259b2c3dcbaf247fe1ec1116fdc
font_01_sfnt_off0000fdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD3 10772 bytes
SHA-256: 7605497fbe208250a08b81454f119f01551af13c9966c0b692544afe48277d9a

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