Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad79e62ddf9dab2…

MALICIOUS

PDF

72.7 KB Created: 2021-03-03 17:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 96b98ab73a5bfe3e6e19bda05e652174 SHA-1: 1138211ae11b7cc696b93ed98f21339ae3d3f584 SHA-256: 1ad79e62ddf9dab2f2834a61e62eede533ef3ea6268ca6d916d3b971226a206a
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/aws?utm_term=ap+human+geography+textbook+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479254/normal_602fb50bdff4e.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/12882719812.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/67142263760.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/13332985548.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413236/normal_6008d667accf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504641/normal_5fcaacb40474c.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/16554382083.pdfIn PDF document text
    • http://famafivas.iblogger.org/tft_item_combo_cheat_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505358/normal_5fd7b23a306c3.pdfIn PDF document text
    • http://zupuvotan.22web.org/40867967508.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470523/normal_5ff4c400a06bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450043/normal_6020b01e6e5c2.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/39804748901.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/zuwimadaneb/que_es_entropia_en_sistemas_de_informacion.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/what_is_the_difference_between_modernization_and_westernization.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_off0000dd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2A 5660 bytes
SHA-256: 50ca263136fa515490c512b57c8077b5e89a164124af38bbd9aa67855e603603
font_01_sfnt_off0000f04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 11124 bytes
SHA-256: f600e185929e5c2586e402e3767943ab87f6733a98dfd27cf563e7d4e34bbb96