Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c8f696566d66aaf…

MALICIOUS

PDF

72.0 KB Created: 2021-02-19 12:37:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 913642d8bcab8e578b9bbc8786843965 SHA-1: 193da0a7e046ffee20afcf28d8bcb75aea23f5d7 SHA-256: 3c8f696566d66aaffafdd4dee6b379e280112cc32abec42a16cf7d43685e5afc
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://crophysi.ru/aws?utm_term=que+es+mantenimiento+mecanico+industrial In PDF document text
    • https://cdn.sqhk.co/livukigelo/iieeia3/89271363037.pdfIn PDF document text
    • https://cdn.sqhk.co/tasewapimol/XSpdjjB/line_graph_in_excel_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/qpzBhaF/honda_gx200_motor_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/i1PwQii/11006375476.pdfIn PDF document text
    • http://m-laskin.ru/rusebakudekasufozuxagozvtxpj.pdfIn PDF document text
    • https://cdn.sqhk.co/fusureviweki/fkjdOid/subonewanolupamifal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuronodufanox.epizy.com/difference_between_synchronous_asynchronous_motor.pdfIn PDF document text
    • http://rigitusavogu.epizy.com/98523863459.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/manual_chevrolet_aveo_lt_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/59714170712.pdfIn PDF document text
    • http://vivimaga.epizy.com/bacardi_oakheart_nutrition_information.pdfIn PDF document text
    • http://doguzikeva.epizy.com/69485422973.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/gotham_bold_italic_free_font.pdfIn PDF document text
    • http://lulanikigog.epizy.com/62545113817.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/10795267211.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_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 5144 bytes
SHA-256: d2868afa7ba97f45f2649abef950741886b29b22a3301dae1418c81c2190166e
font_01_sfnt_off0000eee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE4 10604 bytes
SHA-256: 0f70b50a924b0b63bc8bd4bc964c8ebe78a812c9e48c3cb9488caa08d5cd2fdf