Malicious PDF — malware analysis report

Static analysis result for SHA-256 4551972c9a086252…

MALICIOUS

PDF

70.7 KB Created: 2021-01-27 20:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ad9f3c34cdc855ed88df9e010fca3376 SHA-1: 353a1b16eb203a7f2755db8dfb655f299da7ef37 SHA-256: 4551972c9a086252ff26258c2e3049fb6f5426cd75a29f9faf1e1ab8753e12c7
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://druttle.ru/wb?keyword=minecraft%20pixel%20art%20tutorial PDF link annotation
    • https://cdn.sqhk.co/liripudeb/thdkJmk/auctiontime_day_cab_semi_trucks_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/hf2yWxs/renovurij.pdfIn PDF document text
    • https://cdn.sqhk.co/fekurisakez/t04Njif/pet_urine_neutralizer_spray.pdfIn PDF document text
    • https://visofamawuri.weebly.com/uploads/1/3/2/3/132303269/ea6301087b.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/hczyAia/23791378974.pdfIn PDF document text
    • https://cdn.sqhk.co/jagavibejabe/ogfidhf/2048_cupcakes_unblocked_66.pdfIn PDF document text
    • https://cdn.sqhk.co/fovulifavu/ha1qmjv/mlb_schedule_2019_opening_day.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/gi51o2Q/96953959760.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/dixaleko/nurojevefu.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/tamil_animation_funny_videos.pdfIn PDF document text
    • http://pulupalu.epizy.com/punokibiraxenew.pdfIn PDF document text
    • http://rilifufamorupud.epizy.com/84277857757.pdfIn PDF document text
    • http://valamujunitun.epizy.com/mapbox_map_not_showing_android.pdfIn PDF document text
    • http://mowigefugitixa.epizy.com/66329384066.pdfIn PDF document text
    • http://xefokezutuvij.epizy.com/recent_ielts_writing_topics_general_with_answers.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_off0000da09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA09 4904 bytes
SHA-256: 2133e77805ff52721cb8a153f0e58cf5020449819ea751bd9ee9838e1d5a1175
font_01_sfnt_off0000eadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 10408 bytes
SHA-256: 5d8738a58b06f15826a7c630978f3523f485eeee508c06703b48fa7f5d4fce02