Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc7ee64bf49195b0…

MALICIOUS

PDF

45.1 KB Created: 2020-11-04 01:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf7779ae762829a0d0188249e7987b72 SHA-1: d4a8bd09e74d622858c8cc1bd9f014e8ce18df01 SHA-256: bc7ee64bf49195b00038004353ece14a0451d5dda6d0e9e0bef7a196c9b8d580
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong attempt to direct users to potentially harmful sites. The ML classifier also flagged this PDF with high confidence, suggesting malicious intent. While no scripts were directly executed, the structure suggests a phishing or malware distribution lure.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=wwe+smackdown+live+stream+online
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/66666e4d6f5.pdf
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/6520032.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bepukuba/jobibesasasubixotikisu.pdf
    • https://s3.amazonaws.com/wexukufedepim/demonstrations_today_in_paris_france.pdf
    • https://s3.amazonaws.com/metubevozisul/maestria_del_amor_resumen.pdf
    • https://uploads.strikinglycdn.com/files/7bbb232e-10fc-4b73-94f4-d2768d05ea7c/csgo_edpi_calculator.pdf
    • https://uploads.strikinglycdn.com/files/7c761ef8-a6f6-4d3d-aaa3-0392bb7aa21b/mijilorudekajonanomepid.pdf
    • https://uploads.strikinglycdn.com/files/ce0c45b5-bcc2-4e69-b116-95f0035bff65/61188718892.pdf
    • https://s3.amazonaws.com/tapexiw/muscular_system_worksheet_middle_school.pdf
    • https://s3.amazonaws.com/setaxilitozuko/80139990795.pdf
    • https://s3.amazonaws.com/sugaguxagu/chokher_bali_novel_in_bengali.pdf
    • https://uploads.strikinglycdn.com/files/d5b94f02-52c3-421a-8c31-87adfda8bb8c/xavit.pdf
    • https://s3.amazonaws.com/fufaragebo/bo_tui_tr_online_ting_anh.pdf
    • https://uploads.strikinglycdn.com/files/323b302a-7c50-48ce-837e-b2497ae1107c/danny_boy_sheet_music_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ef8.bin
542961dbe2b72af0d547ab2fe51d802d9eca51b2c2b7de68f7f0683b8ab975fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF8 5316 bytes
font_01_sfnt_off0000810d.bin
a2600d698c093796369dcb581e00c0015c9d4d3378c8e772ee7d3b1c93e27636
pdf-font-stream PDF embedded font (sfnt) at offset 0x810D 11644 bytes