Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4b107f359dc6e6…

MALICIOUS

PDF

67.4 KB Created: 2021-02-09 20:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 23f2784d33004e91f4fde172214aec5a SHA-1: cc45c647a56dd3c9b0512afe3cdb4286bd74a94d SHA-256: de4b107f359dc6e6b9edacda8941852786597a823ea4b3ecb489e7a0c1787b17
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wb?keyword=2020%20year%20calendar%20printable%20pdf PDF link annotation
    • https://misiwutikamiba.weebly.com/uploads/1/3/4/6/134601431/9381566.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/0861b27c8ede.pdfIn PDF document text
    • http://oneshops.space/74280774943bd6ty.pdfIn PDF document text
    • https://nivolepefusux.weebly.com/uploads/1/3/4/8/134886615/0ab89e.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/zelirixud_duzuvawetadexa_zogaguragokiti.pdfIn PDF document text
    • http://nowtorrentz.com/guided_reading_activity_12-_3_world_historypvyhp.pdfIn PDF document text
    • http://alexsaf.ru/67831134787qe4pw.pdfIn PDF document text
    • https://jupagefux.weebly.com/uploads/1/3/1/3/131398252/864f6.pdfIn PDF document text
    • http://levantemosaic.com/32396955359pzjnd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392868/normal_600e577299467.pdfIn PDF document text
    • http://detonic-italy.website/tencel_vs_egyptian_cotton_sheetstjcac.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/vaxebisapesi/78004506301.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/98171265751.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/vpn_master_unlimited_proxy.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/davatetemafafefonufoper.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_off0000cb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9E 5392 bytes
SHA-256: 46c73664b369494ad72ea47ae99f84a2c098fda7431da92a2c31790bb9d807f6
font_01_sfnt_off0000de02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE02 10140 bytes
SHA-256: ac1f8418bd42536cde99df343e2384a7e2c229df12d86296af2cc4d3c006cf79