Malicious PDF — malware analysis report

Static analysis result for SHA-256 552a7fd28e20238d…

MALICIOUS

PDF

80.9 KB Created: 2021-01-16 10:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-19
MD5: 148c45880fc4dd08f48c6c1b769e2e63 SHA-1: 017b176a5dbdb403265d5688aa07ca590c157141 SHA-256: 552a7fd28e20238dfd8e7930b51e344a1ee066c7277f29a65521a6145c9dbb61
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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
  • 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://cctraff.ru/wb?keyword=marble%20race%203d%20mod%20apk In PDF document text
    • https://cdn.sqhk.co/kikutajaz/Zhegijb/filling_holes_in_concrete_floor_before_staining.pdfIn PDF document text
    • https://site-1185731.mozfiles.com/files/1185731/40086129143.pdfIn PDF document text
    • https://site-1176740.mozfiles.com/files/1176740/fobifuraketidaxat.pdfIn PDF document text
    • https://site-1166749.mozfiles.com/files/1166749/air_jordan_5_low_performance_review.pdfIn PDF document text
    • https://site-1177743.mozfiles.com/files/1177743/popaj.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/8644132879.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406228/normal_5fe1ac92b6fca.pdfIn PDF document text
    • https://site-1219938.mozfiles.com/files/1219938/75025586740.pdfIn PDF document text
    • https://site-1171384.mozfiles.com/files/1171384/halloween_costumes_for_kids_girls_target.pdfIn PDF document text
    • https://site-1175421.mozfiles.com/files/1175421/cut_paste_photo_editor_iphone.pdfIn PDF document text
    • https://site-1178037.mozfiles.com/files/1178037/bein_sports_app_free.pdfIn PDF document text
    • https://site-1175393.mozfiles.com/files/1175393/frndly_tv_app_for_lg_smart_tv.pdfIn PDF document text
    • https://site-1191779.mozfiles.com/files/1191779/dubobaridibiwakoli.pdfIn PDF document text
    • https://site-1166675.mozfiles.com/files/1166675/barber_shop_near_me_open_sunday.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off0000e936.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off0000e936.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off000126b4.bin)
    • 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 extracted file (font_01_sfnt_off0000e936.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000def9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF9 2880 bytes
SHA-256: 0274bcdaeac036982f59156e13af1dabd7e74a7e9adf0a2e7295bfc0c1d6646c
font_01_sfnt_off0000e936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE936 4968 bytes
SHA-256: 0dc1426dda69d54b3514267383a0724f28cc405ee410044a34c29d020bc8d5f1
font_02_sfnt_off0000fa12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA12 14256 bytes
SHA-256: 8d8ebce4e687dbdb577510f687c12b934b193472939bc2126d4bd6c823d412e7
font_03_sfnt_off000126b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B4 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd