Malicious PDF — malware analysis report

Static analysis result for SHA-256 7359e8c28b9ab191…

MALICIOUS

PDF

66.2 KB Created: 2021-02-07 09:20:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 10e2d19ee9e6b720f9f1da3f80d6acf3 SHA-1: e941f5017d15a825c50ddde868cbba853bcbc804 SHA-256: 7359e8c28b9ab1910418676cc9f5953b774fc6810947d7e0e23d736a60036320
244 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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/123?utm_term=knives+of+alaska In PDF document text
    • https://cdn.sqhk.co/damukowabij/jjvjcje/uefa_champions_league_winners.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/T0iddgc/parkour_runner_dies.pdfIn PDF document text
    • http://front-glass.website/84122299670mzirz.pdfIn PDF document text
    • https://zavowije.weebly.com/uploads/1/3/2/6/132680855/6877465.pdfIn PDF document text
    • http://uanews.website/vofileriteseferidemojp8z2s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377115/normal_5fed7bbe58d1d.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/ZvjjCDJ/gamers_united_earn_rewards_for_driving.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/gx4JaLd/airplane_movie_online.pdfIn PDF document text
    • http://studytogether.fun/witizudevuwuxaziloumwl.pdfIn PDF document text
    • http://wexebigusokata.iblogger.org/33019375715.pdfIn PDF document text
    • https://rusofejez.weebly.com/uploads/1/3/1/8/131856127/9029117.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/jcigNgg/suvemo.pdfIn PDF document text
    • http://openchambre.xyz/navistar_isis_service5s7o9.pdfIn PDF document text
    • https://cdn.sqhk.co/takabalal/j5fyfgg/funny_dirt_track_memes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462726/normal_5fc8e56a7652f.pdfIn PDF document text
    • https://cdn.sqhk.co/fodibaniwe/edhgghf/jumolotoluseji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikididubemet.epizy.com/aladdin_full_movie_amitabh_bachchan.pdfIn PDF document text
    • http://dolasuwukino.epizy.com/najopige.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_off0000c526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC526 4760 bytes
SHA-256: 4c3ba5bc0fb92ad4f19519ad52b32322672567da425208966f4493e5ecc8fe21
font_01_sfnt_off0000d574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD574 11016 bytes
SHA-256: d4e60086811ef4627fbeb762c58101c11769bc6e6f1ab918ccd36ed1894e34bd

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