Malicious PDF — malware analysis report

Static analysis result for SHA-256 41d9f60fab7f940c…

MALICIOUS

PDF

41.6 KB Created: 2020-09-30 07:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e048f807785cd491df74fb8a1b815257 SHA-1: 500eab53fee17eafa7c0331553834e00c6457089 SHA-256: 41d9f60fab7f940cb9534c35434935795785914aa04188150b7d5fc168081c93
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=caixinha+de+promessas+para+imprimir+pdf In PDF document text
    • https://site-1036977.mozfiles.com/files/1036977/bepumumi.pdfIn PDF document text
    • https://site-1036840.mozfiles.com/files/1036840/pelodavarifusakonerat.pdfIn PDF document text
    • https://site-1036785.mozfiles.com/files/1036785/61871803850.pdfIn PDF document text
    • http://files.lizziemahoneypaintings.net/uploads/1/3/2/6/132681602/f17f56.pdfIn PDF document text
    • http://kuvisa.nosda.com.au/uploads/1/3/2/7/132740494/6be68.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/59582173155.pdfIn PDF document text
    • https://site-1036814.mozfiles.com/files/1036814/vosoduba.pdfIn PDF document text
    • https://site-1037275.mozfiles.com/files/1037275/luvegusagubuganevus.pdfIn PDF document text
    • https://site-1037075.mozfiles.com/files/1037075/37721408547.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/1/0433/0687/7080/files/gaxasukazojolivuf.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_off00006211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6211 5224 bytes
SHA-256: 7897538bcde77dc447953adfdbd0190593ecd3d38e79f1d7f957bc1314c5ab93
font_01_sfnt_off000073ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AD 11864 bytes
SHA-256: 15e896cadeeabe8905cb2645ddf5aeb1975aa6ccca0248bb1f1c52975bc0d8f9