Malicious PDF — malware analysis report

Static analysis result for SHA-256 9102c82f40f26369…

MALICIOUS

PDF

42.8 KB Created: 2020-11-07 05:25:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: fac9fc74747159ebfefc30106b5dceae SHA-1: 175c7501c2394dddd57fa1b4a82aa93589282915 SHA-256: 9102c82f40f263693f1e235ee1ea2c286d95d681a40407ce3af5af021260ffc0
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://traffmen.ru/123?keyword=whack+your+boss+superhero+2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5f9855faaf9c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wawarub.files.wordpress.com/2020/11/balancing_equations_practice_worksheet_answers_chemistry.pdfIn PDF document text
    • https://tojupeti.files.wordpress.com/2020/11/fawuli.pdfIn PDF document text
    • https://vowewefu.files.wordpress.com/2020/11/18298815389.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://wotibubimif.files.wordpress.com/2020/11/boss_me_80_manual_cz.pdfIn PDF document text
    • https://fazojikimugu656942302.files.wordpress.com/2020/11/7660088936.pdfIn PDF document text
    • https://zapawex.files.wordpress.com/2020/11/76912966597.pdfIn PDF document text
    • https://najoluni.files.wordpress.com/2020/11/97098265137.pdfIn PDF document text
    • https://dinozab.files.wordpress.com/2020/11/rekirog.pdfIn PDF document text
    • https://kebupud.files.wordpress.com/2020/11/16674380217.pdfIn PDF document text
    • https://zoniwika.files.wordpress.com/2020/11/antenna_basic.pdfIn PDF document text
    • https://xomujunu.files.wordpress.com/2020/11/56143571898.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_off00005ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE6 5440 bytes
SHA-256: 33d3123dfe7436aab6101d80b8ef01c53fe1f029cff22096582ff0219f4c28b9
font_01_sfnt_off00007173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7173 14108 bytes
SHA-256: f3cf88f2693704bb0a98b6da393f42fac1b5db1de2581d7bc4d237d3520a9070

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