Malicious PDF — malware analysis report

Static analysis result for SHA-256 d556a67dfedd58f1…

MALICIOUS

PDF

48.2 KB Created: 2020-10-06 09:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 86d48b44e79259f94faaa02cd90ed2da SHA-1: e12742462da0b46a268f50dc637d10d64bca3f35 SHA-256: d556a67dfedd58f120da461a67d817ad98bf22780f72ddedc5855f242f140efb
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://gettraff.ru/strik?keyword=clasificacion+de+los+animales+segun+su+desplazamiento+pdf In PDF document text
    • https://site-1039885.mozfiles.com/files/1039885/jebonutijonotukamudozoben.pdfIn PDF document text
    • https://site-1039754.mozfiles.com/files/1039754/xisufusaweputatasorexa.pdfIn PDF document text
    • https://site-1043455.mozfiles.com/files/1043455/6087050614.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/1569984912.pdfIn PDF document text
    • https://site-1037843.mozfiles.com/files/1037843/71162989549.pdfIn PDF document text
    • http://naxuboda.maiganlynnart.com/uploads/1/3/1/6/131636655/d64461e5209.pdfIn PDF document text
    • http://files.ancestorsofmjr.com/uploads/1/3/1/3/131382274/nexanifuxonuba_kewefo.pdfIn PDF document text
    • http://sobofata.drstevenjadlow.com/uploads/1/3/1/6/131606289/9608619.pdfIn PDF document text
    • http://files.bridgendgranite.com/uploads/1/3/1/4/131453114/dofegoviz_gafufakogavim_nuzaxedukoru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3352215b-2e23-43bc-942a-e2cb33fa4554/lukoxufibogokevenelumode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5c0cac9-2ffa-4d17-93d4-144da2985811/72967334890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aff66bf-22a8-492e-8851-570c5c54604a/34260664388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c26771-0825-44ee-804a-21b8c18d9235/deratadevep.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7D 5332 bytes
SHA-256: 3d974528552733a8ef2c8602b3baaaa2cef9fb55210087be334b7f9365ac3bd6
font_01_sfnt_off00008095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8095 10708 bytes
SHA-256: c51fe72eb6ad94b2849598b1d031f927fc0cc03d7c2d5b778c4e4caf259508fd
font_02_sfnt_off0000a370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA370 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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