Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25fc5a065f9e2b8…

MALICIOUS

PDF

51.6 KB Created: 2020-11-08 02:05:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a72929a24c8c62abd68d1244971478c3 SHA-1: 90f3b83d7a44a45ddaa3485c52e3cfe53bfafb72 SHA-256: d25fc5a065f9e2b8bfc2b6aa361907ba4ef25c5b3d084a069f970454585844b1
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://traffmen.ru/aws?keyword=fetch+rewards+apk+2020 In PDF document text
    • https://rasagarus.weebly.com/uploads/1/3/4/4/134452949/01bfc7ca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_5f8d9133c4676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_5f9f68a133903.pdfIn PDF document text
    • https://dewubonate.weebly.com/uploads/1/3/4/4/134466502/rudawulubuzam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416675/normal_5fa4d943b64f4.pdfIn PDF document text
    • https://busozovamifolak.weebly.com/uploads/1/3/4/2/134235369/397329.pdfIn PDF document text
    • https://rilebowiteb.weebly.com/uploads/1/3/3/9/133986594/6534d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuxadol/kitilapurakariniviwobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd88ea75-54b1-45df-be37-08cfe436f51f/chat_rooms_software_free_download.pdfIn PDF document text
    • https://firomikodow.files.wordpress.com/2020/11/majexomitizibubig.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_off000059c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C7 5512 bytes
SHA-256: 1b2acd77621cccab1cb8df88d5b000ff5869acb06e00a5e61e95a5a443e28254
font_01_sfnt_off00006c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C91 15124 bytes
SHA-256: fed55e6bf841d73851c34386bfc5caf8b150f3e9e745b2405707165fd084e750
font_02_sfnt_off00009bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFB 10956 bytes
SHA-256: 0df1c22b5c32893ace3c94f82c07823949fd77c3a4ef00ad96fcb8d21ae854fb