Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7bf1d97a700da07…

MALICIOUS

PDF

66.5 KB Created: 2021-02-24 02:03:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c547695a40f3d6afc40eb810b79a9a15 SHA-1: 9605c09e554dd918090d11b169c058fc8c51d12f SHA-256: e7bf1d97a700da07152c61f641f97a7f2436004c7bb2c57f9f3301447dfb05cc
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.
  • 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://baarspo.ru/wix?keyword=ecosystems+worksheets+5th+grade PDF link annotation
    • http://zufutefej.22web.org/agostinho_neto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420250/normal_5fdaef46cd9fa.pdfIn PDF document text
    • https://talosemes.weebly.com/uploads/1/3/4/4/134494853/batab.pdfIn PDF document text
    • http://cafe-cok.ru/el_profeta_khalil_gibran_resumen_por_capitulosrcwcf.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/c68cdFK/nasal_polyp_causes_symptoms_and_treatment.pdfIn PDF document text
    • http://kelnoteres.xyz/jon_duckett_javascript_and_jquery_downloadzi4lj.pdfIn PDF document text
    • http://vinorama.fun/programming_arduino_uno_in_pure_clgb3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421624/normal_5ff19cb85e46f.pdfIn PDF document text
    • http://zhigina.ru/632618276tk5cl.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/jepinebawo/neren.pdfIn PDF document text
    • http://lojizaruxaz.rf.gd/calendar_template_canva.pdfIn PDF document text
    • http://fanixagef.rf.gd/swan_lake_sheet_music_piano_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/tugugurek.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_off0000c88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88A 5660 bytes
SHA-256: 6720379b919275834c30072bbe9fdafe1a85c1d8378784fa74dfb39b425135a5
font_01_sfnt_off0000dbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC1 9780 bytes
SHA-256: 46ed2c7e7e90932a338e8388e71bacc5e6bf6e2b042c96e3e37524000c8a9ee9