Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a9361564519842…

MALICIOUS

PDF

71.0 KB Created: 2021-02-10 21:25:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 27a7a14f0c43e4624e9f57a756bef44f SHA-1: 53d300333f74b00a6886bcf5f4b20909c94f9acf SHA-256: 83a9361564519842ff888656b8670395a3e4c496b5558747aafd0f6d3cbb69bb
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://yafferge.ru/wb?keyword=articulo%2016%20constitucional%20reformado%20y%20comentado In PDF document text
    • https://cdn.sqhk.co/bawusipa/ihHhfZ0/28418846564.pdfIn PDF document text
    • http://clientbluebadge.com/35261442140ki2sp.pdfIn PDF document text
    • https://cdn.sqhk.co/jizesusaxeta/VGgf2gh/gijulelewixotidaterazuf.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/ihRpGhb/the_academy_the_first_riddle_apk_full.pdfIn PDF document text
    • http://kuwanusefunok.iblogger.org/google_drive_folder_python.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376852/normal_5fde1ac3524c7.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/ge9mhaW/download_bubble_wings_2019.pdfIn PDF document text
    • http://natezaka.iblogger.org/essay_report_format_spm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_601d5f0e930b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/gali_chirugali_song_lyrics_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/best_online_football_manager_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/janekawebemugazazifutad.pdfIn PDF document text
    • http://kegaregajisojas.rf.gd/salorujufejevikapiv.pdfIn PDF document text
    • http://josuremase.rf.gd/51938515167.pdfIn PDF document text
    • http://fexulumusevemi.rf.gd/borderlands_3_trophies_guide.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_off0000d769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD769 5464 bytes
SHA-256: e0cfccd8cf04114adaaf817b1bf2adc9cdc37ba60e9b053c4d791bb183c4e44c
font_01_sfnt_off0000e9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F9 10740 bytes
SHA-256: 7977a5efdf259a47e307db05fa489acc791717d52f0f6f6d6a792c4317d0cb45