Malicious PDF — malware analysis report

Static analysis result for SHA-256 c204718dc1535b69…

MALICIOUS

PDF

49.7 KB Created: 2020-10-31 02:55:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c5831d6358a7b594a78c1924dd7ae941 SHA-1: 9cbc688ce4ec0ad75ec5ee28adb90345f981f74b SHA-256: c204718dc1535b6934f3b481aaaa4cf7693ab614c91bd3ba47bf8770afb4a92a
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/123?keyword=kou+ichijo+social+link+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f88704f6723a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bajuse/lakugomevalineda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc6fab0-0152-41b9-b0e7-e018e5ca0dc4/64920039328.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/educational_technology_jobs_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/49422518629.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/all_things_being_the_same.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/436bf12d-164f-447d-8bab-61ccee872b02/15670345413.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/59182837863.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/85526248911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f6afa47-b6a6-4caa-aa09-8505501d78f3/zitamalesojakabigowexav.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/69429613914.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/53072515119.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/22787950808.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70CB 4580 bytes
SHA-256: 447ff8e605978d58ae2d1d4cc08acc637530cf557ba3ca3b47ab8b5ac8603bf9
font_01_sfnt_off0000811e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811E 5212 bytes
SHA-256: 2b4a0ed3b8ffd7cf3b4521806422349c0dd9e9c34065dd15bcf309bd78cb5d54
font_02_sfnt_off000092df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92DF 11908 bytes
SHA-256: 1a5969ce51f90d60be3292aba41d3bda218382636c2f8cbe776c552bd0956b96