Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b5803360ef695f…

MALICIOUS

PDF

76.0 KB Created: 2021-03-30 04:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7658269771083ca1cbe2bd70742b2867 SHA-1: 99da1444fcbe5c28c268ff1e665e3a803db1f31d SHA-256: 86b5803360ef695f13218da31b76944c72a06da3a637fe449d80a8c31f6f19c4
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 0.9995

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/strik?utm_term=tipo+de+bombas+hidraulicas PDF link annotation
    • https://cdn.sqhk.co/ripalufix/65ii4gh/free_fps_battleground_cover_strike_3d_commandos.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/porsche_944_owners_club_cars_for_sale.pdfIn PDF document text
    • http://zofunubesosena.mypressonline.com/the_sherlock_holmes_collection_7_book_box_set.pdfIn PDF document text
    • http://lobulezinovux.medianewsonline.com/27501952213.pdfIn PDF document text
    • http://xomerisupudegop.medianewsonline.com/mapa_ciudad_bruselas.pdfIn PDF document text
    • http://wupemokabate.scienceontheweb.net/80074680587.pdfIn PDF document text
    • https://cdn.sqhk.co/nulegudup/hgd0haR/92292433160.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/what_does_character_mean_in_the_bible.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/buwoxob.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/hp_officejet_6500a_driver_download_windows_7_64_bit.pdfIn PDF document text
    • http://zokupez.mygamesonline.org/kabubumirepa.pdfIn PDF document text
    • http://napodosawukezob.getenjoyment.net/13294809087.pdfIn PDF document text
    • http://pejelurim.getenjoyment.net/antecedentes_historicos_de_la_administracion_educativa.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/cbema_curve.pdfIn PDF document text
    • http://koxivesuvif.mypressonline.com/acantosis_pigmentaria.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b42898-83dc-45db-bb8a-da3c2cae8b7d/55160728217.pdfIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/bihar_si_mains_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9026a192-cd25-43c4-b09e-6ca86ca5a407/yoga_mudras_in_kannada.pdfIn PDF document text
    • http://duxepivol.myartsonline.com/hallelujah_satb_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3da7555-d502-49f3-97fa-2b3b4020fda4/56342859829.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/borarozupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b471313-eacc-4fb3-8aef-b0f9faae7978/vubenogoromuba.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC6 5404 bytes
SHA-256: c824e55d280d517f33c8ee5d6319177927b1afbadc3191cce2bd0ac028fa812e
font_01_sfnt_off0000fcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF0 11816 bytes
SHA-256: c9e036ff8945f0398ba60937832d09bd8776d947566ac6657c7520c214990bbe

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