Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca949cf888b3fcd…

MALICIOUS

PDF

67.7 KB Created: 2021-02-06 23:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c219a9c21f00a7bd0ddfcc1afa265738 SHA-1: 8ad51df1777d03ee259d225fb2a2035052832862 SHA-256: 6ca949cf888b3fcd6349a8dfe4f978e455eaa57770aa8cfb18fc09674f7c18ea
254 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
  • 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.
  • 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.
  • 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://crophysi.ru/wb?keyword=parallel%20and%20intersecting%20lines%20worksheet%20pdf In PDF document text
    • http://reduslim-eu.site/city_smash_steamzd9ow.pdfIn PDF document text
    • https://febefadu.weebly.com/uploads/1/3/1/4/131453100/rirogewa-gepijigenipapij-fosiwolujasuse-niwebej.pdfIn PDF document text
    • http://legionmone.xyz/different_ways_to_write_book_reportut8ne.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411245/normal_5ffc37684e145.pdfIn PDF document text
    • https://popovomogomube.weebly.com/uploads/1/3/0/7/130738885/6148529.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/ejeMjYT/zipiwumutibifid.pdfIn PDF document text
    • https://jufapagemegugux.weebly.com/uploads/1/3/4/8/134860181/pekekumesutubuseba.pdfIn PDF document text
    • https://cdn.sqhk.co/torixugajo/cghF8ie/86784923145.pdfIn PDF document text
    • http://gimogorox.22web.org/25720077131.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/wuvepilamamuse/c_template_class_inheritance_undefined_reference.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/cricket_champions_cup_2017_mod_apk.pdfIn PDF document text
    • http://sidiwen.epizy.com/worth_it_fitness_dance.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/alita_battle_angel_movie_tamil_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/73624410677.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/website_design_templates_free_dreamweaver.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_off0000cc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC34 5576 bytes
SHA-256: 5870edfba28aab33e163e72d55733f59453336aea4d3587b36f78962e8fd8997
font_01_sfnt_off0000df37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF37 10268 bytes
SHA-256: b6559a26f38db00a58619b264418ea415582cef73e8082866688245505e01401

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