Malicious PDF — malware analysis report

Static analysis result for SHA-256 57bfdb7b419e9e90…

MALICIOUS

PDF

35.8 KB Created: 2020-10-05 23:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 41468a197c655a5139deaad204ae5fe3 SHA-1: 62fdd0d3f17002487e8553e633974f8d373e763f SHA-256: 57bfdb7b419e9e900aaa24820ea3a7c1080d3e4dfee5cfb5899a2c120aaf8113
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://cctraff.ru/strik?keyword=ver+pelicula+it+2017+en+espa%25C3%25B1ol+lati In PDF document text
    • https://site-1036751.mozfiles.com/files/1036751/35260452293.pdfIn PDF document text
    • https://site-1037156.mozfiles.com/files/1037156/59369089925.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/deroj.pdfIn PDF document text
    • http://files.sknitsb.com/uploads/1/3/1/4/131406947/nobumileneze.pdfIn PDF document text
    • http://files.sewingmachineguync.com/uploads/1/3/0/9/130970014/devigabas-lofitu.pdfIn PDF document text
    • http://files.xoglamaccess.com/uploads/1/3/2/6/132682193/eb7c833ba4cd83f.pdfIn PDF document text
    • http://wovela.alexisangels.net/uploads/1/3/0/9/130968921/cec784b.pdfIn PDF document text
    • http://fiweka.onyxbeautystudio.com/uploads/1/3/1/3/131380868/2939838.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7947/0756/files/physical_chemical_properties_changes_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1214/5830/files/sushi_catapult_unblocked_games_66.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2001/0140/files/guitar_pro_6_mac_offline_activation_keygen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8802/4230/files/what_is_a_developmental_question.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3b5d2e9-fa04-4e83-8c66-7795cd341a55/46615000228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da13d4ac-b59c-404c-acc2-30a968acf964/suzed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00a38dc0-39b3-4745-b094-698fd613bda2/bixijitimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53257944-9ac6-4f29-98b5-fe9a61e4035d/10505465634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99159979-0dcf-47c1-8b76-f34c31eb76b1/xolipizowoju.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_off00004a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A89 5508 bytes
SHA-256: 1bac32b3189a1623e077c9d93575d7098f0afa28ff55e78b9dd4acb55cb2f76d
font_01_sfnt_off00005d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1D 10784 bytes
SHA-256: 0872f6086cc4be6de0ad70d1c1579d9c7e1ed205912cf8bb79adfdd534d02c52

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