Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec4821a91b74490…

MALICIOUS

PDF

72.7 KB Created: 2021-02-26 14:23:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 76caea0e0e9dff8004bf4de1a626832e SHA-1: 841f359cfd7ee4b89b7c778eb606253b757bd50f SHA-256: dec4821a91b744904c1cd40ba698bb8350106584e886cbaa2244a45a84753b59
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/wix?keyword=shortnin+bread+song+history PDF link annotation
    • http://creamwalls.online/uefa_champions_league_fixtures_2020_21_seasonc7jgf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_6026dcd4b0744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_5fe9cfe38d2dc.pdfIn PDF document text
    • http://app-3null.com/lopebauztkv.pdfIn PDF document text
    • http://zuvels.xyz/mutuxenozafelav3e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492286/normal_5fe1a32b1a85d.pdfIn PDF document text
    • http://lnstagramverifycentre.com/manozatijamepakupih7w2o.pdfIn PDF document text
    • http://dfds.in/da_vinci_s_ships_modmok51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427523/normal_5fca3cc25ff96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mefovu/55347563870.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/65598735773.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/24481041577.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/gobet.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/canoscan_toolbox_lide_110.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD328 5188 bytes
SHA-256: b6a97b5dbfa31966dcf866dc472af7b5ea4d5bfa1b78dfa4eb4810db3c1aae6e
font_01_sfnt_off0000e4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 10184 bytes
SHA-256: 764b7693ac3d063c10618630e9c18f0a8c1f158879958aaf0fb21afc757b53ce
font_02_sfnt_off00010769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10769 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c