Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4bf22fe33a135c7…

MALICIOUS

PDF

44.8 KB Created: 2020-10-13 18:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 345082d1cc8a6eca05412eb6dbfe04a1 SHA-1: 75b942b996e5f2806860d5368f8ed7ba8181f82d SHA-256: a4bf22fe33a135c76f1a1dd51a90d1daf59d150f3f171bd15a7621c771e5e518
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://cctraff.ru/strik?keyword=game+pokemon+gba+untuk+android In PDF document text
    • https://site-1043093.mozfiles.com/files/1043093/milulixebos.pdfIn PDF document text
    • https://site-1040675.mozfiles.com/files/1040675/jetetaro.pdfIn PDF document text
    • https://site-1039846.mozfiles.com/files/1039846/nutozujewivutumonemeje.pdfIn PDF document text
    • https://site-1039669.mozfiles.com/files/1039669/dusoxemajuroliri.pdfIn PDF document text
    • https://site-1039900.mozfiles.com/files/1039900/19440230241.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/rotizizalipi-xulejowo-wegevok-xutijub.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rotesojelunemiroto.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/lixavej_rivutavipulox_vunezikavad_lirumonoguwako.pdfIn PDF document text
    • https://site-1042444.mozfiles.com/files/1042444/64491570760.pdfIn PDF document text
    • https://site-1039203.mozfiles.com/files/1039203/zojid.pdfIn PDF document text
    • https://site-1044238.mozfiles.com/files/1044238/gumopekomaxazu.pdfIn PDF document text
    • https://site-1037024.mozfiles.com/files/1037024/36616493889.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/1/0476/7707/9718/files/ap_statistics_chapter_3c_test_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1406/0702/files/car_eats_car_2_deluxe_kizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8717/9160/files/97407955019.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_off000070e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E6 5304 bytes
SHA-256: c3ee61a34d8445e2c33707fb0c5cef712664417f335bcec501a3a3e8d3c13011
font_01_sfnt_off000082de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DE 10420 bytes
SHA-256: c0063b17b7dbeadc95d0249983247e0a186510be94d42cbf7a97d34084f9936b