Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ffb9cc99736922…

MALICIOUS

PDF

44.1 KB Created: 2020-10-14 08:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 963981c3976a8fbfb5cc375e7c1df7f3 SHA-1: b77904a9caa0bc9f0814053552ab6e18807bc077 SHA-256: a6ffb9cc9973692261485aff71d7b7a6f8a946fbfd422bb939492348ec5abef9
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=3+phase+induction+motor+connection+pdf In PDF document text
    • https://site-1042448.mozfiles.com/files/1042448/duzuruwedis.pdfIn PDF document text
    • https://site-1043939.mozfiles.com/files/1043939/lojesokare.pdfIn PDF document text
    • https://site-1039488.mozfiles.com/files/1039488/22702506361.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dekegu.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/32e063a95e.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/tigosorivibisakoxu.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/jogowezokuvaxu.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • https://site-1036873.mozfiles.com/files/1036873/womukafatukotumom.pdfIn PDF document text
    • https://site-1039833.mozfiles.com/files/1039833/84854879743.pdfIn PDF document text
    • https://site-1039307.mozfiles.com/files/1039307/dofubuzidijosazimijubagow.pdfIn PDF document text
    • https://site-1036824.mozfiles.com/files/1036824/vutif.pdfIn PDF document text
    • https://site-1038634.mozfiles.com/files/1038634/tozabarusugebalim.pdfIn PDF document text
    • https://site-1042107.mozfiles.com/files/1042107/92428514212.pdfIn PDF document text
    • https://site-1041927.mozfiles.com/files/1041927/silijasozededebodafa.pdfIn PDF document text
    • https://site-1037177.mozfiles.com/files/1037177/31451913304.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_off0000700d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x700D 5432 bytes
SHA-256: 71e1878d83d9c2a60e033fc58039b418805a9016c218207ed7f55e2fde6162d8
font_01_sfnt_off00008246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8246 9712 bytes
SHA-256: 3da88051e67ad940eebb6810ae7843df8a5fcc0375d8abdbedb1accd4ed5ec79