Malicious PDF — malware analysis report

Static analysis result for SHA-256 31795b767a2d35aa…

MALICIOUS

PDF

49.7 KB Created: 2020-11-07 01:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 1cb47dcf1188218caa1d19173ff3d03b SHA-1: 22729dd0e175a2fc587e1a462634205f032fbd92 SHA-256: 31795b767a2d35aaa3ac3059983bd42ef7396f02b87dfd4245f04e471f9c380b
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/aws?keyword=persona+4+golden+marie+boss+guide In PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/webojaw_puberore_navowupopikofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387050/normal_5f9c01056eb5b.pdfIn PDF document text
    • https://faxipanonuk.weebly.com/uploads/1/3/4/3/134352952/f7825.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/lorerexeg/femominosimigizevokibe.pdfIn PDF document text
    • https://nusazepiroj.files.wordpress.com/2020/11/adobe_reader_xi_11.0.21_download.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/budgetary_process.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/the_bronze_horseman_pushkin.pdfIn PDF document text
    • https://zatejoru847961968.files.wordpress.com/2020/11/72489844693.pdfIn PDF document text
    • https://gupebizew.files.wordpress.com/2020/11/divisibility_rules_worksheets_5th_grade.pdfIn PDF document text
    • https://ripigewub.files.wordpress.com/2020/11/82004849966.pdfIn PDF document text
    • https://dipadek.files.wordpress.com/2020/11/warframe_riven_stat_guide.pdfIn PDF document text
    • https://tutitogigu.files.wordpress.com/2020/11/11656611734.pdfIn PDF document text
    • https://lofakuserizo.files.wordpress.com/2020/11/free_cryptic_quiz_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/barbara_oakley_learning_how_to_learn.pdfIn PDF document text
    • https://lugeraropeva.files.wordpress.com/2020/11/17809607452.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/tojuxeriwesozelalusupib.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000732a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x732A 4552 bytes
SHA-256: a14dbb1649db82c093976d325d88c7c28a0351fc1138b4e091e1b5d34f9dbc8d
font_01_sfnt_off00008326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8326 5372 bytes
SHA-256: 86a1903fb3cd6ce11049f37349c6ee17abaf42f525588b6d94eacaf4dc67cec2
font_02_sfnt_off00009557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9557 10564 bytes
SHA-256: e576cc0a9f4eeed325f49ab667b3c461909dea54a57ca783b30e7abd19e45642

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