Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c3d93a2b96589eb…

MALICIOUS

PDF

64.3 KB Created: 2021-01-17 19:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: 780fa08e490bc5f6e0c6df021b6d788f SHA-1: 918d855cac2c2e4673cc013e72f037f99268932f SHA-256: 8c3d93a2b96589eb87281714d35313ea7ff0d77062f09ff2791fb13efab128fe
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffine.ru/123?utm_term=libro+el+martir+del+golgota+de+enrique+perez+escrich+pdf In PDF document text
    • https://cdn.sqhk.co/rojarasam/taRCgjP/bivawupolorowaz.pdfIn PDF document text
    • https://site-1203095.mozfiles.com/files/1203095/android_autosize_textview.pdfIn PDF document text
    • https://site-1217518.mozfiles.com/files/1217518/mtz_820__2_agroinform.pdfIn PDF document text
    • https://site-1174368.mozfiles.com/files/1174368/dinosaur_simulator_hack_script_dna.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/fRbiihf/kumofukitiwumoduvogerekax.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/p7bD2gi/89443785496.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/jbhiss0/cardboard_boxes_with_lids_uk.pdfIn PDF document text
    • http://gakivako.iblogger.org/proper_address_format_one_line.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/ejjDjdZ/dasodewegililasid.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/dq0OvDa/88220371155.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buwumipulufi.epizy.com/tonokodom.pdfIn PDF document text
    • http://kebafitesulodu.epizy.com/free_fast_browser_for_pc.pdfIn PDF document text
    • http://xupanapil.epizy.com/industry_report_template.pdfIn PDF document text
    • http://ziriboxemo.epizy.com/21622202020.pdfIn PDF document text
    • http://pawutewitozi.epizy.com/for_elise_guitar_sheet_music.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_off0000bd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD7A 5828 bytes
SHA-256: 3c561784f9ed29e84cba0220840785e6a7f3444c062256a9bb91e0b8fba6f15d
font_01_sfnt_off0000d119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD119 10696 bytes
SHA-256: e4cb93aa5710df6b7bb6844e9a922f05aa99e75a8b02336a573a0d1248b5f898