Malicious PDF — malware analysis report

Static analysis result for SHA-256 c83362f412e50b85…

MALICIOUS

PDF

38.3 KB Created: 2020-10-10 11:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: be775d2f41c72bb8f88d455a5af3a9e6 SHA-1: 60a014e33d784600ad280b371a9764b72802a66b SHA-256: c83362f412e50b85998f555c85db1f74491200575e07955e554866882ac28cd7
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://ggtraff.ru/strik?keyword=bose+soundlink+speaker+ii+manual In PDF document text
    • http://files.keepitmovinginc.org/uploads/1/3/0/8/130873946/dazibituj.pdfIn PDF document text
    • http://files.changeforindia.net/uploads/1/3/1/6/131636866/tirepabidureruvo.pdfIn PDF document text
    • http://gimifar.mrahmedcomputing.co.uk/uploads/1/3/1/8/131871767/kajiba_zemugojib_baxurugebuvuro_migufabel.pdfIn PDF document text
    • http://nomev.starprairielandtrust.org/uploads/1/3/0/9/130969176/8362573.pdfIn PDF document text
    • http://fefuxo.hcesaladmaster.com/uploads/1/3/1/3/131398547/tavivobasebe.pdfIn PDF document text
    • http://files.childrenshousecornwall.com/uploads/1/3/1/4/131407736/fd343f986.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/40884f31-e384-494b-b40a-b954e8a47dc6/61872680943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/400d15e7-5a94-44d3-aeb4-e96ecf2ef008/70765359651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a70aa6c0-0837-4c1e-b695-a02c8886b427/68585050055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22832df1-a577-4f2e-850d-cdf0b8659d19/74272680091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1770/5893/files/vewopilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3051/4344/files/paul_mitchell_super_skinny_serum_directions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3239/1061/files/bootstrap_file_upload_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8575/6568/files/ls_island_new_york.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_off0000584b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x584B 5220 bytes
SHA-256: fc297130866803a953eff6cb1641a9bf85b1ba13a74331288dd312300b8e9efa
font_01_sfnt_off000069f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F2 10304 bytes
SHA-256: 60af2f34c420a40c5a4948b89efe798680f77c6c96095a69e8a78073cd0223eb

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