Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b67abd54c4eed2…

MALICIOUS

PDF

67.6 KB Created: 2021-02-27 18:05:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6e2912b5640386d3a9801a352d5097dd SHA-1: 994b0dfb8c8f8b49237592a73e7f2052364d7468 SHA-256: 35b67abd54c4eed2aec117a86b9a0dd7d6ae2783798ffef16423aad7d5c265e5
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://crophysi.ru/award?keyword=hp+motherboard+bios+reset In PDF document text
    • http://shoop-fe.ru/mathe_binomische_formeln_einfach_erklrt84ath.pdfIn PDF document text
    • http://anstel.pro/download_file_opener_windows_7zaboc.pdfIn PDF document text
    • https://cdn.sqhk.co/vevigagexoxa/PG1hbjg/stack_color_hack_mod_apk_download.pdfIn PDF document text
    • http://twoup-viktoria.online/what_is_knowledge_workerpzelt.pdfIn PDF document text
    • http://dirtygirl.fun/monica_her_story_bookdi2pv.pdfIn PDF document text
    • http://hookup755.fun/86039549003y6325.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/hfVjfUg/sacrifice_define_synonym.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377931/normal_5ff46f7e29949.pdfIn PDF document text
    • http://piguzipudoval.iblogger.org/vexesor.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/tugawupobamovarugopari.pdfIn PDF document text
    • https://cdn.sqhk.co/jalinutaxos/ifztjjc/square_painted_wall_art.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/jdskgf4/jump_ball_blast_mod_apk_android_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tivozabalilibo.rf.gd/where_to_buy_track_hurdles.pdfIn PDF document text
    • http://nuwikomoxiso.epizy.com/36696392763.pdfIn PDF document text
    • http://seguwogira.rf.gd/firewall_app_blocker_32_bit.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_off0000cd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD89 5268 bytes
SHA-256: b9f9049335e7aed17db20e5d97e0aefe50b2db4c9bc4204de720ffae5ce38184
font_01_sfnt_off0000df34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF34 10044 bytes
SHA-256: c3f743025bcc5c2a019d002a0cda6c1660deefc3b9bd729e4395325a52a8dfd2