Malicious PDF — malware analysis report

Static analysis result for SHA-256 5163ad7c9844e5fc…

MALICIOUS

PDF

50.8 KB Created: 2020-09-30 13:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 959179d6df08fe5180f852c4c4daf1a9 SHA-1: f48b1ce1ac0b3754b11c86731291f354758f2c99 SHA-256: 5163ad7c9844e5fc81b34e1c088735e4f4bfa3365a6e89e20a6f865cd4413a83
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=emulsion+polymer+technology+pdf In PDF document text
    • http://files.tolgardgames.com/uploads/1/3/1/4/131453723/wuwoxemunelipovurate.pdfIn PDF document text
    • http://jamur.tahoesacredvows.com/uploads/1/3/1/6/131637419/5642726.pdfIn PDF document text
    • http://files.quebs2016.org/uploads/1/3/0/8/130874612/sodofuw_dirugirewutalef.pdfIn PDF document text
    • http://rarujinaf.objectpages.com/uploads/1/3/1/4/131453872/jogadug_falerun_visimuleve_fibawesazu.pdfIn PDF document text
    • http://files.ayrarcheryclub.org/uploads/1/3/0/7/130740138/635c0.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/bazasemoduzomusenivo.pdfIn PDF document text
    • http://papizutul.iglesiabautistalasflores.org/uploads/1/3/2/6/132682327/3717544.pdfIn PDF document text
    • http://sepitapo.runwildandbe.com/uploads/1/3/1/0/131070001/tesilubef.pdfIn PDF document text
    • http://files.reagandickey.com/uploads/1/3/0/8/130814666/zunebosonubojub-tetevuburuzi-xetiseje.pdfIn PDF document text
    • https://site-1036918.mozfiles.com/files/1036918/30080663243.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/durofimekigaxukojod.pdfIn PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/99477041302.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
    • 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_off00007c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C70 5300 bytes
SHA-256: f8f9c622b7f56fe34aa84644467c45dd851e37d0408b6d7bc9a4e668376df07b
font_01_sfnt_off00008e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E56 9972 bytes
SHA-256: 55c6e9dd8fa86a7278a17bd17dcb77dadcdc2f2ecd9029534aff9c13998f7fe7
font_02_sfnt_off0000b071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB071 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378