Malicious PDF — malware analysis report

Static analysis result for SHA-256 a625ecb412fa47cb…

MALICIOUS

PDF

72.5 KB Created: 2021-02-14 19:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6767ebe886c829f80644bcf32a586d34 SHA-1: 39361a8ff7e062e7a4933cd6f7e7020144d2ad37 SHA-256: a625ecb412fa47cbaf162b7bc6e8c229354e33ea2747a12ddfb97593e79e6bb2
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://crophysi.ru/123?utm_term=what+is+discord+overlay In PDF document text
    • http://youla-24.cc/mixed_perfect_tenses_exercises_wzeld4.pdfIn PDF document text
    • http://itawegan.fun/la_novelita_2_letra2j3xm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5fd9cb3b64d38.pdfIn PDF document text
    • https://cdn.sqhk.co/kixeworu/hbiiFha/flippy_snowmobile_race.pdfIn PDF document text
    • http://kayikciakademi.com/tokobefutyr5el.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460706/normal_5fccedae48cf4.pdfIn PDF document text
    • https://cdn.sqhk.co/gixixutiji/ifjd4ji/59452681105.pdfIn PDF document text
    • http://fringigejy.site/570585969207r3w2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451039/normal_5fc5c0f218ced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_6015640965584.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451754/normal_5fecf7e50855e.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/pp9jjWW/tuning_motorcycle_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/iajhhaf/ratorivigufawubedupaga.pdfIn PDF document text
    • http://izzzaaa.space/adornos_regalos_navidad_manualidadesl9356.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/ggiiuPe/dinghy_davits_systems.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/cgfuicV/29438497206.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/hgQjfZ9/25607259223.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425010/normal_5ff0cf8c81024.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE022 5200 bytes
SHA-256: 9a7c3e6c04b0f0000e3fd56e22dab5d183c65c1ba374d33ab8a2a6e77a8bc141
font_01_sfnt_off0000f1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E0 10332 bytes
SHA-256: dfb2d4a9c9f76ebd304eafe9d6ee2e1515074e0c4bd4b5f8580302d352794aba