Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6ea829b882b1b4…

MALICIOUS

PDF

70.2 KB Created: 2021-02-15 07:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 78392c799c5d987d2eabf7142b097245 SHA-1: 4f7666cfaf36010aab061c9a5e2b480cf4fa24d6 SHA-256: 3a6ea829b882b1b4143a1b8fc0dd6ee5f3e371fd4418c1173d3d2e184cb9c322
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://leonvi.ru/wix?keyword=lesson+5.3+kite+and+trapezoid+properties+worksheet+answers PDF link annotation
    • http://myirn.icu/55143350547okhdl.pdfIn PDF document text
    • http://fit-italy.space/odisha_b._ed_entrance_exam_syllabus6anbj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451555/normal_600a42a44f397.pdfIn PDF document text
    • http://evakuator-uga.ru/68810355986z14co.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389365/normal_60082df43bb87.pdfIn PDF document text
    • http://1offpark.xyz/custom_radio_flyer_wagon_partsx766o.pdfIn PDF document text
    • http://boretibixakofer.iblogger.org/ajker_weather_report_paschim_medinipur.pdfIn PDF document text
    • http://iwhite.space/laburerudujiruut3n9.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/galinikagopit/kommetjie_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/apics_cscp_learning_system.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_off0000d4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E0 5484 bytes
SHA-256: caa2b6baf0f8d6e8448f78b25052d0d01c86b30bf822936869be641178fd4a34
font_01_sfnt_off0000e7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A8 10672 bytes
SHA-256: b1d536b6e6b9f423d0e0ecd868858687c6677c16d33d650b0249ea2a0980b8cb