Malicious PDF — malware analysis report

Static analysis result for SHA-256 4123da7a12ce7b12…

MALICIOUS

PDF

72.1 KB Created: 2021-02-19 10:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 48b9948180b90b05a8661b8e733d8fa2 SHA-1: 2871b9181e98f1ff81893c1a9c386a600673b2db SHA-256: 4123da7a12ce7b12d966ac46b1892b85044521798aeb078b843affcd1dbb0dd1
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://yafferge.ru/wix?keyword=life+fitness+cst+club+series+treadmill+manual In PDF document text
    • https://cdn.sqhk.co/muresogus/TEjjSf6/fruit_master_game_download_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/geha1ig/jurassic_world_the_game_hack_download.pdfIn PDF document text
    • http://fionainthefield.org/the_death_cure_trailer_release_datejzl1g.pdfIn PDF document text
    • http://pupalara.22web.org/what_reading_level_is_50_shades_of_grey.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460981/normal_60068ba623303.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383165/normal_5fdf70bcf1063.pdfIn PDF document text
    • http://hangzhoumetal.ru/68456742276znptn.pdfIn PDF document text
    • http://gibipimaxadebip.iblogger.org/40288772004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459062/normal_60150de3eb387.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/gjaWQ40/nova_launcher_apk_pro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413705/normal_5fe8d52724827.pdfIn PDF document text
    • http://kotebebe.iblogger.org/27606127878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470543/normal_5fd6db59d06bc.pdfIn PDF document text
    • http://gerododuxokamid.iblogger.org/best_online_guitar_lessons_2019.pdfIn PDF document text
    • http://kiguporut.iblogger.org/chrome_remote_desktop_for_windows_7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pigosoj.epizy.com/luxerizexamurilisa.pdfIn PDF document text
    • http://pirarotuweze.rf.gd/xulikomaki.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_off0000cf87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF87 5248 bytes
SHA-256: a5f0ed626b879999e32dd2b2ef8c45b7119c03634db85d99a9c6521ffdc70e33
font_01_sfnt_off0000e14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14D 16300 bytes
SHA-256: 3011f8b8aa31b167bbe504aef6a327d3d8c117fb352433707a11c7b83f76665b