Malicious PDF — malware analysis report

Static analysis result for SHA-256 c21f784cc4129c59…

MALICIOUS

PDF

74.4 KB Created: 2021-02-03 12:04:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 59a589c44242f52c0a3b3b24920cfb60 SHA-1: 1a2be108baa4dc3d19b7109b7b2c92cdf90c0ccb SHA-256: c21f784cc4129c59587168f697c2d6b344617e16fdfd242e38218a9f63763f01
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://maypoin.ru/wb?keyword=cdc%20influenza%20vaccination%20information%20for%20healthcare%20workers PDF link annotation
    • http://setovewurepenu.22web.org/8848933739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481278/normal_601595d62493c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472768/normal_600bab057bdee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506159/normal_5fdb9aa139983.pdfIn PDF document text
    • http://dezlice.ru/xemikuwolivebidetuwadiwaqx4q1.pdfIn PDF document text
    • https://nikamajavefuxo.weebly.com/uploads/1/3/1/0/131069808/ee8aaabfaecb38f.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/7007074.pdfIn PDF document text
    • https://gedesinikus.weebly.com/uploads/1/3/5/3/135323437/836cb70d22e5.pdfIn PDF document text
    • http://natgood.space/suxubozoxuzotabulak237if.pdfIn PDF document text
    • https://vebajixumese.weebly.com/uploads/1/3/4/4/134483039/6065384.pdfIn PDF document text
    • http://najapizarut.22web.org/brtten_nete_hesaplama_forml_manuel.pdfIn PDF document text
    • https://levarimabogi.weebly.com/uploads/1/3/5/3/135328943/sepore-rebemovumet.pdfIn PDF document text
    • http://mavito.online/niposokukibewubixisozoxhok4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460060/normal_6018a57bf1417.pdfIn PDF document text
    • http://lanufutado.22web.org/zonovemoteji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://telebil.rf.gd/97072784423.pdfIn PDF document text
    • http://detotoga.epizy.com/magazine_layout_templates_for_indesign_free.pdfIn PDF document text
    • http://kipafiperugava.epizy.com/69108246450.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_off0000e393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE393 5432 bytes
SHA-256: 2f9d0c04b059b03565319f77d119c9c365e38d09a6e2bd65ac005f6171406580
font_01_sfnt_off0000f600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF600 11456 bytes
SHA-256: f69042a9f520ce25273fe7bd8b3e36168343f582126e80a0c213f82f0ee05a3a