Malicious PDF — malware analysis report

Static analysis result for SHA-256 c761135cabf0f7da…

MALICIOUS

PDF

43.0 KB Created: 2020-11-06 00:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 21ac328fd421cf986761042feb411681 SHA-1: 5a0eabbea84461a4a9036a6e9528f36774cd7653 SHA-256: c761135cabf0f7da06c3d5a429cb827beb0fc5500e40b382f27d11a89147b2fe
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://cctraff.ru/123?keyword=mapa+mundo+covid In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384310/normal_5f90e73c4c98b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406782/normal_5f9fb4af16773.pdfIn PDF document text
    • https://kifugezob.weebly.com/uploads/1/3/4/5/134529667/98de2efaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380528/normal_5f95946c09c65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5f965dc04bde9.pdfIn PDF document text
    • https://romovemesokawaj.weebly.com/uploads/1/3/4/4/134479736/xiwugube.pdfIn PDF document text
    • https://wisizexabebaj.weebly.com/uploads/1/3/4/4/134461468/pugozuvutuwekama.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/2585027.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3656/4375/files/arterial_system_of_human_body.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/55894776969.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/gatofatiketukogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8316/0483/files/correlation_and_regression_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/canon_powershot_sx20is_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fulomufimikim/principles_of_statistics_bulmer.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/64_games_master.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_off000069bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BD 4980 bytes
SHA-256: b41736fef2b214efdab50da46632a9dd059780748815d2c29df7f5fec520bf39
font_01_sfnt_off00007ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB3 11160 bytes
SHA-256: 68b3e33d8450e10c77644c3b903f9bf45a4ea66fa719e7898e3496f56c1e58b0