Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f12ce4ead25e552…

MALICIOUS

PDF

72.9 KB Created: 2021-02-28 06:53:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 238f04018bcc09be5f2a0966dee7bd16 SHA-1: 39c0ba86d740dbd8e717c065480a7a90ba6c00fe SHA-256: 5f12ce4ead25e5524238e62f90111a5f72a8602f58de9407704e10921a6d937b
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=xylophone+songs+by+color In PDF document text
    • http://smartcoin.design/duboxikofonusodosamopayy9uu.pdfIn PDF document text
    • http://maxist.ru/47284961011jpnyl.pdfIn PDF document text
    • https://cdn.sqhk.co/dagorabowixu/hgichhd/friends_tv_show_quiz_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426815/normal_60254db772bb3.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/8picigW/first_time_pregnancy_symptoms_in_malayalam.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/dqZkeie/boat_wallpaper_for_mobile_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/jg7idin/53913676276.pdfIn PDF document text
    • http://palorobumuwew.iblogger.org/koxegulebivak.pdfIn PDF document text
    • https://cdn.sqhk.co/foxoxaze/Wji9ms0/elgato_game_capture_hd60_xbox_360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426572/normal_603ac3549abc7.pdfIn PDF document text
    • http://tradestaroffice.com/hubli_weather_report_livekm8bx.pdfIn PDF document text
    • https://cdn.sqhk.co/gixobujikelu/hfhb1je/nupotatajasodoluvofelova.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/Shgekib/45345244063.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xasepeza.rf.gd/what_is_a_beautiful_daughter_in_spanish.pdfIn PDF document text
    • http://roworozirad.epizy.com/vimasuro.pdfIn PDF document text
    • http://biforobajimebug.epizy.com/sazologafipifuxidaf.pdfIn PDF document text
    • http://venukaluxe.epizy.com/commercial_agent_contract_template.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_off0000e0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FB 5204 bytes
SHA-256: a3a147cfe2f33bbab10c0a7e64aaa2985a1f68dcc3d618f60042e21791a06ad8
font_01_sfnt_off0000f2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B3 10436 bytes
SHA-256: 1665a9e20bc28b2e10381d7a503fcb57c4940e89bbe1c4787b8a9cc4a5d0911c