Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f1653ad06bf905…

MALICIOUS

PDF

39.1 KB Created: 2020-10-07 20:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 75583bd8e6f5edae8630c4609dedc5d1 SHA-1: e8331f5d5caebc18367c15f0a98838f7c84c1ae8 SHA-256: 92f1653ad06bf90501d02b7cf67cde76e293d4b454f583a57574fc08a8f9f7a9
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://gettraff.ru/strik?keyword=nec+table+430.250+pdf In PDF document text
    • https://site-1039925.mozfiles.com/files/1039925/34303813026.pdfIn PDF document text
    • https://site-1041949.mozfiles.com/files/1041949/15328061588.pdfIn PDF document text
    • https://site-1042016.mozfiles.com/files/1042016/1790982072.pdfIn PDF document text
    • https://site-1036833.mozfiles.com/files/1036833/borezinomurefopa.pdfIn PDF document text
    • https://site-1038460.mozfiles.com/files/1038460/kafenumojajusofelikabofet.pdfIn PDF document text
    • https://site-1036731.mozfiles.com/files/1036731/55065546085.pdfIn PDF document text
    • https://site-1040558.mozfiles.com/files/1040558/kiwako.pdfIn PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/87630341716.pdfIn PDF document text
    • https://site-1036971.mozfiles.com/files/1036971/28703186580.pdfIn PDF document text
    • https://site-1042359.mozfiles.com/files/1042359/20623061927.pdfIn PDF document text
    • http://files.stuartestates.com/uploads/1/3/0/7/130776517/2423a040f09f.pdfIn PDF document text
    • http://rajitute.artfeltcollaborative.com/uploads/1/3/2/7/132740405/kosaputo-jomop.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_off000059be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59BE 5664 bytes
SHA-256: d1fea3f34f47dbd4947a4e78072693c024ad7b102fd7885a48ccb6013d4c140f
font_01_sfnt_off00006d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D28 10296 bytes
SHA-256: 9bb7fc80420e115fb7407f5d1721a3ead5b57083d97111dd016c69ba81bd0d57

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