Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac4ecfa26ed01b2…

MALICIOUS

PDF

69.1 KB Created: 2021-02-07 05:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e9f297700649672039da4716fc820bf5 SHA-1: f1ef767b33dde4b51b8b02521c71f4a5ab7d8c5d SHA-256: 5ac4ecfa26ed01b23afdfce6e0d6dcc57ca693c663973be152238a33e0156ee4
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wb?keyword=analisi%20logica%20schema%20riassuntivo%20pdf PDF link annotation
    • http://xtreme-sport.ru/828771275491mecy.pdfIn PDF document text
    • http://pycnidwzxc.info/3819500185992hy4.pdfIn PDF document text
    • https://cdn.sqhk.co/dadakafopina/R0K9Zb5/monstera_plant_leaf_brown.pdfIn PDF document text
    • http://varistop.site/descargar_biblia_reina_valera_1960_plybxj.pdfIn PDF document text
    • https://cdn.sqhk.co/sotisajen/gY8idgg/2313268723.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412767/normal_5fed4ad19e2be.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/gasad.pdfIn PDF document text
    • https://cdn.sqhk.co/zekoparan/aa9Ewhe/past_for_future.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/Lmm2pic/terifokotifofamuwogeb.pdfIn PDF document text
    • http://labiosdewonda.com/afterlife_tv_series7xlwx.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/gelawiweza/57129536277.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/bailaras_2017_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/jirerizikuzoduwi.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/68861064305.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/91955901436.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_off0000d107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD107 5620 bytes
SHA-256: 7b898327b429b4b23a5db79288cd5da66c1da700ec7580d04225ff5cdbff6ff6
font_01_sfnt_off0000e403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE403 10964 bytes
SHA-256: b5d98b4cb1c81c1e571e7839c3812526e90488d5083afaa85d0d5e57e9ea38b9