Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f0b0a6a95340fd…

MALICIOUS

PDF

72.3 KB Created: 2021-03-03 12:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c263702d764e1b05e1e28472915fed2c SHA-1: efe1fed06494e54da49d27c39edd896325ad3eb2 SHA-256: 91f0b0a6a95340fd73c5a2cac4d2e9d2c37a7fea0298f71616d1331ee69184cc
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/award?keyword=little+sas+book+datasets In PDF document text
    • https://cdn.sqhk.co/merojuniv/hjeJdEo/rock_radio_stations.pdfIn PDF document text
    • https://cdn.sqhk.co/pememobuwir/fgeyhbD/37754996959.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370051/normal_5fd062ed7e138.pdfIn PDF document text
    • https://cdn.sqhk.co/pepinuvobov/ifidq1W/cat_bird_jewelry_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/kisereta/ibvSBKE/descargar_brick_breaker_para_blackberry.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/1ghjjif/benji_bananas_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488842/normal_60319c91ae2fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491169/normal_600b0349ced6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489404/normal_5feefd7c29e12.pdfIn PDF document text
    • https://cdn.sqhk.co/wovegorarev/3haAhaZ/21914357803.pdfIn PDF document text
    • https://cdn.sqhk.co/ditutafewaw/7n5zheN/giroxevuzo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zivuneko.epizy.com/parquet_courts_human_performance_blogspot.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/dolch_words_1st_grade_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/2587331581.pdfIn PDF document text
    • http://sitovimewimes.rf.gd/fomugidejowijavidek.pdfIn PDF document text
    • http://pusobif.rf.gd/634535608.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/71700283841.pdfIn PDF document text
    • http://nixelotiseze.epizy.com/chloroform_definition_in_english_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/93074156055.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_off0000e09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09F 4868 bytes
SHA-256: aafe1a5ef9c9abc23300d459957f070452a947ae8f0e4dbfb5de892b12213c7d
font_01_sfnt_off0000f13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13F 10136 bytes
SHA-256: 54aad473947635d72c990858b12c82700cea111615f4975de8a0f48e5ff4c14f

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