Malicious PDF — malware analysis report

Static analysis result for SHA-256 e272e47642fb4cd2…

MALICIOUS

PDF

101.1 KB Created: 2021-02-08 23:23:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8ef73a51f1adfebed7881539b9b964c4 SHA-1: e73a016b200097b070182db45c2e71db1e18fbd8 SHA-256: e272e47642fb4cd28d12e691ab1224cc195924610495cb47f8d62a404688e1dc
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/wb?keyword=baseband%20data%20transmission%20pdf In PDF document text
    • http://trellos.fun/33519476270qnnzg.pdfIn PDF document text
    • http://nadixonoju.iblogger.org/laboratory_experiments_in_microbiology_answer_key.pdfIn PDF document text
    • http://bemelegevew.22web.org/washington_food_handlers_permit_test_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483870/normal_5fd787d7dc880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375197/normal_5fe7006454dc4.pdfIn PDF document text
    • http://reduslim-eu.site/4404424590o86f9.pdfIn PDF document text
    • http://kamaz-ftc.com/patowijurigazoripedoxu3fn6x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457847/normal_60117c704aa0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428054/normal_5fdfab21a121c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381083/normal_5fd76aef6bca0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bopuxenuxesozu.rf.gd/25301561734.pdfIn PDF document text
    • http://tugefewose.rf.gd/46153462977.pdfIn PDF document text
    • http://potubavaziripek.epizy.com/diablo_3_farming_guide_2019.pdfIn PDF document text
    • http://fiwusinuba.rf.gd/danny_brown_atrocity_exhibition_zip.pdfIn PDF document text
    • http://nabotiwufonego.epizy.com/st_bedes_lanchester_sixth_form.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_off00014c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C93 5344 bytes
SHA-256: 46cf75e501236c894d6d52994e350065dacef10d0cd8e8b56f0831c6c0c22c9f
font_01_sfnt_off00015ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA1 12304 bytes
SHA-256: 30187bd614a7e44ec087ff6659e52423412ed9a9475cc3c4bbbd93b71992ed73