Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed90e56c71140467…

MALICIOUS

PDF

72.5 KB Created: 2021-02-21 19:22:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b4b6d65eb0a5de5befafede162a7622f SHA-1: 8a7a81fd9182ee144c1471627a82a596b94c74f7 SHA-256: ed90e56c711404671a0bc95da1a7587487fe3a33fe7d5add0f31498818e6cb8e
96 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/strik?utm_term=boy+scout+rank+requirements+tenderfoot PDF link annotation
    • https://fewojejano.weebly.com/uploads/1/3/4/3/134348079/dezukas.pdfIn PDF document text
    • https://rudarizegofuk.weebly.com/uploads/1/3/4/3/134355262/kebosagenarag.pdfIn PDF document text
    • http://rexexepunefa.22web.org/hotstar_tamil_vijay_tv_serial.pdfIn PDF document text
    • http://pifofumega.22web.org/xozuxizaxonawewip.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/j26sgjt/vuguzog.pdfIn PDF document text
    • http://vibubag.22web.org/pijoguradisaxud.pdfIn PDF document text
    • https://didilajuti.weebly.com/uploads/1/3/4/5/134585724/zorafaz.pdfIn PDF document text
    • https://suzixibaru.weebly.com/uploads/1/3/4/7/134709676/vatekijobojutev-taduton-givefekugi.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/betefowubevat/baazigar_all_songs_pk.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/comprehension_worksheets_for_struggling_readers.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/aggro_warrior_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/zelda_breath_of_the_wild_guide_shrines.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/alaipayuthey_tamil_song_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/71713952604.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/3047532933.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_off0000dd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD40 5476 bytes
SHA-256: 9fc7597ddeb8622dc7d01e0a760c38f629aa98ee2213e32a759d6db78accad1a
font_01_sfnt_off0000efdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDF 10872 bytes
SHA-256: 9fc2c493d17bfd3a1d2a4939ce5eb0eaa0eeb6ea0df7539b74af80eb5f886c21