Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a405d14aa4e6687…

MALICIOUS

PDF

45.8 KB Created: 2020-10-07 12:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e04747e704a4101ae8153f14c53d74ec SHA-1: 7592422ac6e778b554612f6c3230d04b18a9956e SHA-256: 1a405d14aa4e66870c164bb0e099f3636050eb9c04ff2e6c80e6f3a592124662
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://cctraff.ru/strik?keyword=the+like+switch+pdf+reddit In PDF document text
    • http://xiwusajep.mastervedicastrology.com/uploads/1/3/1/8/131856023/684393.pdfIn PDF document text
    • http://files.markellscloset.com/uploads/1/3/1/4/131453016/6126568.pdfIn PDF document text
    • http://files.yingjungchen.com/uploads/1/3/0/7/130775249/zopoxenegarujetepaku.pdfIn PDF document text
    • http://files.cobrasfhc.ca/uploads/1/3/0/8/130814931/gekike_ripasudota_sakaze.pdfIn PDF document text
    • http://files.b3risksolutions.com/uploads/1/3/0/9/130969083/3723413.pdfIn PDF document text
    • http://zadorebe.limeandstoves.com/uploads/1/3/1/4/131412290/parorugowa_sivomap_pomokokinir.pdfIn PDF document text
    • http://dalakesut.mwdga.org/uploads/1/3/0/7/130739192/163429651ef46.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/runer.pdfIn PDF document text
    • https://site-1038733.mozfiles.com/files/1038733/rilabuvoludulozujixuwebad.pdfIn PDF document text
    • https://site-1042992.mozfiles.com/files/1042992/97136883462.pdfIn PDF document text
    • https://site-1041387.mozfiles.com/files/1041387/98892817963.pdfIn PDF document text
    • https://site-1040129.mozfiles.com/files/1040129/padexamufimejubufugugulu.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/71874201691.pdfIn PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/vumurax.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_off0000741b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x741B 5140 bytes
SHA-256: 27ba5d4a61b48a755a7db1f97e114fce6d47f7d210a06560f91bc6cdeb52359f
font_01_sfnt_off000085a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A7 10644 bytes
SHA-256: 8af91d9cf514c907bfae0d5224555d63031202cce0f4aa48bbadc8cd44fbd9af