Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a07b7adbcf43750…

MALICIOUS

PDF

75.6 KB Created: 2021-03-27 15:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3b5ecb2e44635f9dc226c95a9b6996ed SHA-1: b1d8d1102a4d9007605ce636afae66c2e9c59a39 SHA-256: 7a07b7adbcf43750fea10949e052000991daf656d228e5b4bec1acb1eb4965bf
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 0.9996

Heuristics 5

  • 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 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://fokemale.ru/award?keyword=class+12+sociology+notes+pdf PDF link annotation
    • http://vevaxogejaz.scienceontheweb.net/53721043549.pdfIn PDF document text
    • http://turopedadogexub.22web.org/asia_map_with_countries_and_capitals_names.pdfIn PDF document text
    • http://fiwisud.getenjoyment.net/65286120530.pdfIn PDF document text
    • https://cdn.sqhk.co/sinonari/hasUiji/54944531145.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/81idnha/ancient_history_of_central_america.pdfIn PDF document text
    • https://cdn.sqhk.co/dajusonas/hbKhdrX/combine_like_terms_expressions_worksheet.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/172368c0-ba0e-44be-8ed8-aff6fbb6540a/78389456400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47ac09f-fd20-4c58-8f9c-b0ed2060a17c/miwonorazijezuzururedi.pdfIn PDF document text
    • http://likasiz.epizy.com/dreamscene_activator_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3d9337-6746-4bb9-a4e2-5c922a36feef/harley_davidson_maintenance_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f634aa-85cb-4528-a875-7688435cad15/is_homelander_bad_in_the_comics.pdfIn PDF document text
    • http://xosofidevutora.epizy.com/cesim_simulation_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df9c80e-d4f2-4d80-bc17-afee2fd93266/sportcraft_tx400_treadmill_not_turning_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa36a039-f008-402a-a277-837ebfa140ef/26263814119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e645a2a-6935-4eb3-9b8c-a33a8ee28c61/program_management_office_vs_project_management_office.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8722f71c-14d6-452e-8961-abb8bef917be/98565471664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8715fa65-d9ea-4634-80aa-d2c68a83efdc/zawominozujiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d2a8f81-dbfe-4e73-bf01-9f4762e8b146/sql_tutorial_download_free.pdfIn PDF document text
    • http://dibijix.rf.gd/how_to_activate_eset_smart_security_5.pdfIn PDF document text
    • http://muropij.epizy.com/90416911806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f27e851d-7d64-44cf-b5aa-85d5191a1a2d/womubamolobekoxavisuw.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_off0000eb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB96 5420 bytes
SHA-256: 3f20ad301342560f80a1ba97c5cb8131ee78eb67cdb813e2c1e7a61547362ec1
font_01_sfnt_off0000fe2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2B 10264 bytes
SHA-256: 6ae1e766fba64c220393ec850e9a7baadb03ddb28b4160fc884746eb7b3d49c5

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