Malicious PDF — malware analysis report

Static analysis result for SHA-256 d842acd6debe38bd…

MALICIOUS

PDF

39.6 KB Created: 2020-10-09 03:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a69afde139db673ffbfaaf59c54d4729 SHA-1: 1b35f341e75ff32c5cbfc50f9292ec8881b3a4c4 SHA-256: d842acd6debe38bdfd31c77993186654b9b8d149b69700c327a41a1267c64329
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://ggtraff.ru/strik?keyword=skyrim+hunterborn+guide In PDF document text
    • http://files.the-meat-sweats.com/uploads/1/3/0/7/130775130/a94e833e3e671.pdfIn PDF document text
    • http://mowos.lakecountyrecovers.com/uploads/1/3/0/8/130874043/77c3186.pdfIn PDF document text
    • http://fanowiki.globalnomaddy.com/uploads/1/3/2/7/132712572/mekokosabuji-xuxezon.pdfIn PDF document text
    • https://site-1039885.mozfiles.com/files/1039885/72192519261.pdfIn PDF document text
    • https://site-1036676.mozfiles.com/files/1036676/99717121971.pdfIn PDF document text
    • https://site-1043169.mozfiles.com/files/1043169/78368759011.pdfIn PDF document text
    • https://site-1039257.mozfiles.com/files/1039257/65036335396.pdfIn PDF document text
    • https://site-1041944.mozfiles.com/files/1041944/63287153945.pdfIn PDF document text
    • https://site-1038472.mozfiles.com/files/1038472/81206597112.pdfIn PDF document text
    • https://site-1039698.mozfiles.com/files/1039698/xegugilojadudagawamolubol.pdfIn PDF document text
    • https://site-1043120.mozfiles.com/files/1043120/vexofes.pdfIn PDF document text
    • https://site-1038789.mozfiles.com/files/1038789/wuzapiwidavawizo.pdfIn PDF document text
    • https://site-1039923.mozfiles.com/files/1039923/mutanotu.pdfIn PDF document text
    • https://site-1039163.mozfiles.com/files/1039163/danabexoge.pdfIn PDF document text
    • https://site-1041779.mozfiles.com/files/1041779/89884540106.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_off00005e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E41 5228 bytes
SHA-256: ca50855da400b1ff0439b5b7d719d67ce633d025dd33ee0bb35edf75110b00c0
font_01_sfnt_off00006feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEB 9984 bytes
SHA-256: ea2b49adc045e1ec9d8e42e36831af884c72ffcb0601578b77831175a405578d

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