Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a4480fbb0f6e65…

MALICIOUS

PDF

68.9 KB Created: 2021-02-25 15:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2bc08bc52c76d5249c7ca18d04ff66c2 SHA-1: f9f4ee506a6e631ed02c0f4756c996cd15a1cd0a SHA-256: f9a4480fbb0f6e65629f919bd36041a46fdb74715401bed04ed9f84789003d0f
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jacksth.ru/wix?keyword=under+armour+batman+football+gloves PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369905/normal_603566ae350de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392220/normal_6012dba52bb86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445544/normal_5fdf32639bd06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449603/normal_5fe8f3fde5a85.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/hb31uii/spina_bifida_cystica_myelomeningocele.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385214/normal_5ff0e2be50929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484990/normal_600cc6e257213.pdfIn PDF document text
    • http://buytoday.cc/61907265136dyxws.pdfIn PDF document text
    • http://devicesprotectionforusers.site/239107115765f1x2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_6027d549e0586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_600f1907586be.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/best_networking_questions.pdfIn PDF document text
    • http://thefortykuti.com/nuwesitokurerokezegemeoljwo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fidajakafitota.epizy.com/measurement_accuracy_and_precision_worksheet.pdfIn PDF document text
    • http://suzawelo.epizy.com/58361894214.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_off0000ce41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE41 5420 bytes
SHA-256: 087716da56207ac4d2db9fbf428b1f24830b6f2af0e331b20b6d31e386ab8d41
font_01_sfnt_off0000e09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09F 11152 bytes
SHA-256: dbc6f1c18eda59cc266cac1f1fd2cd2da27db4e9e6c11fca1796fe50703dde9e