Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf72db884ba9b9d…

MALICIOUS

PDF

81.0 KB Created: 2021-02-19 00:51:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 04af7500c354cac1c60c00cabcaa960b SHA-1: 1da8e58645f42e616ddd7a65a82afc9c34c19205 SHA-256: 3bf72db884ba9b9de8628c99a80ff9b1520c04e80a92db5ac5dbc3ad8e7ab80b
126 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
  • 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=how%20do%20i%20reset%20my%20kidde%20combo%20smoke%20co%20alarm PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393346/normal_5fd6a7f4665ee.pdfIn PDF document text
    • https://fesomexipilajuj.weebly.com/uploads/1/3/3/9/133997099/5996740.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/hbivgfF/logo_maker_2020_3d_logo_designer_mod_apk.pdfIn PDF document text
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/1656705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_60292c963bee3.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/DEbighh/only_one_you_book_read_aloud.pdfIn PDF document text
    • https://nikamajavefuxo.weebly.com/uploads/1/3/1/0/131069808/3040067.pdfIn PDF document text
    • https://fukoroxovelamos.weebly.com/uploads/1/3/0/7/130776486/dowatetiwokix.pdfIn PDF document text
    • https://bimevaxufozuz.weebly.com/uploads/1/3/2/6/132683359/luwuvabufujuw-tirug-firinik.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/mesotodimus/55058117906.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/90830806390.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/voposaw.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/41172129689.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/tidumusimuwis.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/free_admin_template_angularjs.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_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 5444 bytes
SHA-256: 4a11f788f5156878708b830589e54b8ad3c220a4a8bd56536760e75a067d5f19
font_01_sfnt_off000112fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FC 10532 bytes
SHA-256: a531c6ca6fc0ba5b191df53e010f83c1935c8b11fbdb0f3807ffe27b10ab609d