Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5ff6dda06b2b80…

MALICIOUS

PDF

35.0 KB Created: 2020-10-07 08:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 129448349d0a4f758417f56c40b19ea0 SHA-1: 3266518ea7c6abf836ea941675a9099e59ee116b SHA-256: bc5ff6dda06b2b80bc5ef59621ab822be4869dc8ff78a7b97a24306cbc5e1fc8
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=violencia+intrafamiliar+en+el+peru+pdf In PDF document text
    • http://files.magicboundtravel.com/uploads/1/3/1/8/131857315/nunogodag.pdfIn PDF document text
    • http://gofali.mywstudiospa.com/uploads/1/3/1/4/131407558/pameta_nixopamotobi.pdfIn PDF document text
    • http://files.shootingcandidly.com/uploads/1/3/0/8/130814066/xapag.pdfIn PDF document text
    • https://site-1040764.mozfiles.com/files/1040764/sobekeruzasekalu.pdfIn PDF document text
    • https://site-1043890.mozfiles.com/files/1043890/jizufefajebofe.pdfIn PDF document text
    • http://nebegi.snugharbormarina.com/uploads/1/3/1/8/131859527/tumavigenimeje-govado.pdfIn PDF document text
    • http://files.shoptrueblessings.com/uploads/1/3/0/8/130813846/4937404.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7996/3302/files/black_sports_and_entertainment_hall_of_fame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6973/0723/files/green_valley_ranch_check_cashing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7713/0658/files/diggys_adventure_city_of_digg_ten.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_off00004ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE0 5088 bytes
SHA-256: 9eb2716af11e415b4e1a98c2db288e3ec437a2039d74158adbf8de9025af5b6c
font_01_sfnt_off00005c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1F 10292 bytes
SHA-256: 0e5cb357be8ce93ffd9f691aca7b73fd16c6fec8b02c12f2dce5959b73fa3d16