Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c818f0bfa454e6…

MALICIOUS

PDF

70.3 KB Created: 2021-02-12 19:55:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1c557587ce356c819ea3c06f76f9c84c SHA-1: e7890a99cd5a2fafc3b04191bd511bc34dba76a9 SHA-256: 65c818f0bfa454e649e93c2bcfb3ee72b10c5c7cc9c35d79d028323f13c3ebdb
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/wix?keyword=dare+essay+examples+2019 PDF link annotation
    • https://cdn.sqhk.co/nilamemiw/eo8phfd/38441884423.pdfIn PDF document text
    • https://dubibezu.weebly.com/uploads/1/3/1/4/131453247/c2810c409e225.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/4775879.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/jihiZhi/md_anderson_library_parking.pdfIn PDF document text
    • https://gutazalofekeva.weebly.com/uploads/1/3/5/3/135395177/wumebel_vimebapamizi.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/k2jglia/100_sounds_for_baby_in_womb.pdfIn PDF document text
    • https://cdn.sqhk.co/lolumebitana/5jd2ifH/top_10_city_building_games_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493221/normal_5ffa08cd30185.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://viwuleraxukopiz.epizy.com/world_map_blank_worksheet.pdfIn PDF document text
    • http://gokamevagared.epizy.com/free_printable_paper_gingerbread_house_templates.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_off0000d754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD754 5616 bytes
SHA-256: 658464500682f5d397d4276d53002deb2c5dd39d9aaf0fd58c60c53414bdb8e8
font_01_sfnt_off0000ea6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6B 10020 bytes
SHA-256: d7c220c5de84bd9a3f75b6d74c89b92947db4fb985caa45fcc04317d91bba741