Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56daf4378ed87e7…

MALICIOUS

PDF

69.5 KB Created: 2021-02-19 22:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e05695f23d3cdf417eebb73e9f90c0cd SHA-1: a744545f5e2ac7ed13dc21f07136a0190353c434 SHA-256: c56daf4378ed87e7135f17209aae52863e743d7983666aee07d36e75735604c3
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://jottigo.ru/wix?keyword=interjections+worksheet+with+zombies PDF link annotation
    • https://cdn.sqhk.co/fuwegamuvev/ehdTJKx/vomag.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/jZFfGii/wikabojixajibizejugalinel.pdfIn PDF document text
    • https://cdn.sqhk.co/wemonamo/bbiiyQz/subnautica_reaper_leviathan_locations_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449000/normal_5ffad7770fbb3.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/hbXDYhb/5973525552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_60299b1b8003e.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/ufeCsjg/hallmark_channel_when_calls_the_heart_season_6.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/GOhdihc/pozudim.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/igicYib/7080681014.pdfIn PDF document text
    • https://ruxibudowivuk.weebly.com/uploads/1/3/4/7/134728491/totodotusu_vixato_bumigudeboke.pdfIn PDF document text
    • https://cdn.sqhk.co/libodinidep/aicG809/dupoxipuketibowu.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/fokapikow/difference_between_android_oreo_and_pie.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/wef_competitiveness_report_2019_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/decimal_fractions_worksheets_grade_8.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_off0000d571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD571 5156 bytes
SHA-256: 0f2fb96743d47c44a1168ab9c41ab7e1286261ded23bd8e5776a66dc9c8fde24
font_01_sfnt_off0000e6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EF 9972 bytes
SHA-256: 4af56f89f108c7ab9a56c62181ad0aeb80983220b243e6a2ed0052e2b2f275cd