Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7892f8c5e656621…

MALICIOUS

PDF

39.5 KB Created: 2020-10-01 09:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 63b8173087a26bc7555503525edd8fa7 SHA-1: 16bb0220ab1a1f339f55a2d85aaa5fe567cad80d SHA-256: e7892f8c5e656621b8cc5fc11bfd8f94d6c2e40d83dd00ce61bd90fc37c429f4
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://cctraff.ru/strik?keyword=analogy+pdf+question In PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/80412483709.pdfIn PDF document text
    • https://site-1037840.mozfiles.com/files/1037840/13478192860.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/34059986784.pdfIn PDF document text
    • https://site-1039270.mozfiles.com/files/1039270/7379544043.pdfIn PDF document text
    • http://files.woodlandslandcare.org/uploads/1/3/0/8/130874250/rotipalunej.pdfIn PDF document text
    • http://files.aliciaallenphotography.com/uploads/1/3/1/3/131379743/4cec02c7.pdfIn PDF document text
    • https://site-1036874.mozfiles.com/files/1036874/rotafibur.pdfIn PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/14881394053.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/64088508415.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/48351211271.pdfIn PDF document text
    • https://site-1039143.mozfiles.com/files/1039143/22592944002.pdfIn PDF document text
    • http://files.mylhcc.com/uploads/1/3/2/6/132682048/5e1cf255925376.pdfIn PDF document text
    • http://wufob.crafty-copy.com/uploads/1/3/1/3/131379070/gejewelaje-dovagu-gijemefu-zidufotof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD0 5328 bytes
SHA-256: 3f341431bad7f2b35b247d40db5102d0ec7deb7e978581b42c8ba12cfce9359a
font_01_sfnt_off0000700e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x700E 10008 bytes
SHA-256: 541d891bb44e23b9b62537bf96626e40b865be021aa00e9f154f50b0ba2a2e03