Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d1b8a66a1e4ed7…

MALICIOUS

PDF

34.4 KB Created: 2020-10-02 09:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b9f531b6d9d208f3dd05da1ba9ee2c60 SHA-1: b3a5cf60090cd76692a8d5caab3d4a4591a973f1 SHA-256: 98d1b8a66a1e4ed71df71645bfdc9189bdea17711e3b0e982e242bc73c376904
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=mujra+gujra+way+mp3+download In PDF document text
    • https://site-1037246.mozfiles.com/files/1037246/lokazedopusen.pdfIn PDF document text
    • https://site-1037241.mozfiles.com/files/1037241/81071415659.pdfIn PDF document text
    • https://site-1039456.mozfiles.com/files/1039456/62800955374.pdfIn PDF document text
    • https://site-1037048.mozfiles.com/files/1037048/wironetixumedidinitata.pdfIn PDF document text
    • https://site-1036973.mozfiles.com/files/1036973/73232417026.pdfIn PDF document text
    • http://files.cleocork.com/uploads/1/3/1/4/131406506/e73caf854c46.pdfIn PDF document text
    • http://pomozumu.garnseysferalacres.com/uploads/1/3/2/7/132741508/vudekaw_gikaveteguwixel_kumajubamoj_luzovabolegiwi.pdfIn PDF document text
    • http://files.rainshadowacres.com/uploads/1/3/1/3/131384583/8823a79.pdfIn PDF document text
    • http://redomid.billsamsel.com/uploads/1/3/0/7/130738848/lamafumu-soborere-tatapelituji-jogogotik.pdfIn PDF document text
    • http://files.valerielongencaustic.com/uploads/1/3/1/0/131070792/4496ee.pdfIn PDF document text
    • http://golasegor.depthstiny.com/uploads/1/3/0/9/130969656/93e0194f9.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/1/0433/7614/8643/files/67546047025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9495/3124/files/mighty_god_trent_cory_chords.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_off0000456f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x456F 5540 bytes
SHA-256: 5332df8a6606a0509752ec197aa7372a72dbb0a571f800455171d117bbefcd44
font_01_sfnt_off0000585b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x585B 10684 bytes
SHA-256: 05cdd5e6c7d544c93f0c55acd87038f8e7d62a203be3842d1ef47953d565f848