Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a63e2d0b700874…

MALICIOUS

PDF

78.7 KB Created: 2021-02-27 13:54:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bfb08ee1abf814baf464c95899683b08 SHA-1: 947e6dd190c0aae8928165e82ce1d8a753ed730d SHA-256: a8a63e2d0b70087476cfca96df999682062102f42719f948095a3d0b3422a64f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://dafemum.ru/strik?utm_term=descargar+el+manual+de+carre%25C3%25B1o+gratis In PDF document text
    • http://maska-respirator.shop/brother_hl-2240_tonerovq8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489981/normal_6034ea8a402e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490918/normal_60114ad86dc92.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/on_the_road_truck_simulator_console_release_date.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495558/normal_602827262698f.pdfIn PDF document text
    • http://espaceabonne.com/gamers_wallpaper_for_pcr2ob4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476567/normal_5ff2f5fc72987.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445119/normal_6000e4f7870d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495976/normal_5fdb6716ec55a.pdfIn PDF document text
    • http://discovljzg.fun/31430314646i4adu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417145/normal_60362b7785d7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rogofideb.onlinewebshop.net/22._how_many_chickens_would_it_take_to_kill_an_elephant.pdfIn PDF document text
    • http://dazesokagevak.rf.gd/wefojudisodejibibiwi.pdfIn PDF document text
    • http://xorikija.epizy.com/cambridge_dictionary_free_for_windows.pdfIn PDF document text
    • http://bixodog.rf.gd/young_thug_power_mp4.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_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 5468 bytes
SHA-256: 4f90c358a0d39d8a2137e1dc78525777b3352940bcca8b00efe69d160bec9f2c
font_01_sfnt_off000103d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D7 12516 bytes
SHA-256: 3d00b4aec599161edc1e264f4d872cad719b95761a4bbbd8200c07f9813813fc