Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c31e561ca958b1…

MALICIOUS

PDF

40.5 KB Created: 2020-10-11 16:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2ea7133acfff301c5b13171c6a502ae0 SHA-1: a5df21e4cab509e528725854eec21aec0e0accae SHA-256: 03c31e561ca958b1725d427eae0ec96da8ed994d80c69d9ccbb577407820baa3
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=how+to+learn+dutch+quickly+for+free In PDF document text
    • https://site-1041285.mozfiles.com/files/1041285/vuboloregidanenuxu.pdfIn PDF document text
    • https://site-1042672.mozfiles.com/files/1042672/zogifanepufupar.pdfIn PDF document text
    • https://site-1036627.mozfiles.com/files/1036627/sexukug.pdfIn PDF document text
    • https://site-1039405.mozfiles.com/files/1039405/59354475203.pdfIn PDF document text
    • http://losej.crafteahearts.com/uploads/1/3/1/3/131380183/kitesatorijiwo.pdfIn PDF document text
    • http://files.fastlanenitrous.com/uploads/1/3/1/1/131164479/9187223.pdfIn PDF document text
    • https://site-1038836.mozfiles.com/files/1038836/xoxigidapotolatemez.pdfIn PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/motulifofusanu.pdfIn PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/mosofikeposejogukef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/727f29e6-4660-498f-8526-4bf9ae0f6ab9/momubugokukifolomuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/752aa4e2-6b6e-4be6-bcfd-0d9f4dd8c1cf/zuligijopomogifov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe27ba80-7031-412e-a1fb-966cd50b96f5/24647975686.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_off0000604e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604E 5276 bytes
SHA-256: 6afc1605c79df390f5599742c43c499f35c5c4c7f90ba3d56f77fba5771ef73b
font_01_sfnt_off00007242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7242 10280 bytes
SHA-256: 31ab810425e14c38e1b363a8e258159e4a7ac09711fe11b075309f8cf69f4dda