Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5a1554348b1f2a…

MALICIOUS

PDF

75.7 KB Created: 2021-02-27 12:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ba85b19860435f9af6cf890c72d0c580 SHA-1: a93cc999119bf2bf203ed2fdfa7d5de0e8a4d52b SHA-256: 4f5a1554348b1f2ae1859ad58a6c19a52d585b6d0a356ed762f941f35458f0ed
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/award?keyword=onkyo+tx-nr515+arc+not+working PDF link annotation
    • http://veritebadisifif.iblogger.org/high_density_eva_foam_sheets.pdfIn PDF document text
    • http://winoorama.site/razorokagfb53l.pdfIn PDF document text
    • http://rikeropovi.22web.org/android_phones_under_10000_to_15000.pdfIn PDF document text
    • http://setomomenoku.22web.org/83945391506.pdfIn PDF document text
    • https://rudazijix.weebly.com/uploads/1/3/1/4/131453676/5951776.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/bubeto/yamla_pagla_deewana_2_movie_1080p.pdfIn PDF document text
    • http://rekujub.rf.gd/white_tiger_netflix_us_release_date_and_time.pdfIn PDF document text
    • http://mupigedosawi.epizy.com/percy_jackson_the_titans_curse_movie_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/8672591330.pdfIn PDF document text
    • http://lotijedopedo.epizy.com/non_profit_organization_charter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/35805121703.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/sosonokipevodawi.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/elementary_linear_algebra_anton_12th_edition.pdfIn PDF document text
    • http://bemagarawizelep.rf.gd/epic_electronic_medical_record_tutorial.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/xijavexafawe.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_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 5316 bytes
SHA-256: 3a10ee13eeca321b158d129a4434d2d2196ec98dde443a720878cb0e6b4c2919
font_01_sfnt_off0000fe38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE38 10456 bytes
SHA-256: 42ec516c79b53ee8090d4f57d5d7e319377923e55449b67cc8da34c99200ed2a