Malicious PDF — malware analysis report

Static analysis result for SHA-256 63bc90610380c094…

MALICIOUS

PDF

71.8 KB Created: 2021-02-14 12:29:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 37089e8ec54f5948747c05d53936ad32 SHA-1: 33b32044ebc487c92c76db8080949ca26518db3a SHA-256: 63bc90610380c094efda86c3b96750b34868f36c4dc2165948150d00678d1d50
126 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/aws?utm_term=enlarging+reducing+shapes+worksheets PDF link annotation
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/1595227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418367/normal_5fe9593b9db6f.pdfIn PDF document text
    • https://zixojubagever.weebly.com/uploads/1/3/4/6/134613499/4845796.pdfIn PDF document text
    • http://nawitovafoxuw.22web.org/rotevisijo.pdfIn PDF document text
    • http://mowewuwopirot.iblogger.org/bach_concerto_for_two_violins_sheet_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://meresig.epizy.com/semenifesekozav.pdfIn PDF document text
    • http://dulubuli.rf.gd/vades.pdfIn PDF document text
    • http://mapexas.epizy.com/ijazat_movie_songs_ming.pdfIn PDF document text
    • http://konasepobave.rf.gd/78333476207.pdfIn PDF document text
    • http://funolowudako.epizy.com/cube_world_guide_leveling.pdfIn PDF document text
    • http://golujaxi.epizy.com/bomowapetifupu.pdfIn PDF document text
    • http://tosuniwenalob.epizy.com/balveer_ke_photo.pdfIn PDF document text
    • http://jamudux.epizy.com/how_to_backup_android_phone_onto_computer.pdfIn PDF document text
    • http://napilidowolaro.rf.gd/free_cursive_writing_chart_printable_worksheets.pdfIn PDF document text
    • http://rojepubaxogo.epizy.com/usc_math_placement_test_answers.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_off0000d931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD931 5448 bytes
SHA-256: 28d191ae0e7ef5849540931e447445304fb5d668b4fb884a520d5cb7cff476eb
font_01_sfnt_off0000ebc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC7 10844 bytes
SHA-256: baf441bde554610493f99f3450164dc40695cf3c5a3e5d6c0634ac76e4d640f0