Malicious PDF — malware analysis report

Static analysis result for SHA-256 85c1871a6bfcdf5e…

MALICIOUS

PDF

67.5 KB Created: 2021-02-12 00:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8c8d82fdcd6e21384960455611c6fc36 SHA-1: cd2978d416771a91fe5228a6dc027e60a8e48eeb SHA-256: 85c1871a6bfcdf5ef85b36e7b06566578729360b387366a5119e4c07eff30ed9
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://maypoin.ru/wix?keyword=eres+tu+maria+workbook+answers PDF link annotation
    • https://muxapikaw.weebly.com/uploads/1/3/5/3/135346573/4295290.pdfIn PDF document text
    • https://xomowozijirogap.weebly.com/uploads/1/3/4/6/134667332/8303385.pdfIn PDF document text
    • https://cdn.sqhk.co/pimupigedu/ghjgF3a/world_cup_penalty_2018_unblocked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501383/normal_5ffbacc65e998.pdfIn PDF document text
    • https://kodirovotosin.weebly.com/uploads/1/3/2/8/132814250/2718378.pdfIn PDF document text
    • https://susakatevasek.weebly.com/uploads/1/3/4/8/134871092/boxeropixavosako.pdfIn PDF document text
    • https://rapusixub.weebly.com/uploads/1/3/4/6/134631860/bejogagu-voximapofinel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369936/normal_5fca3c0b21963.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470035/normal_600d361d14f69.pdfIn PDF document text
    • https://zimovezinidukiv.weebly.com/uploads/1/3/1/4/131453924/rofekuvomu_foritifoki_nabid.pdfIn PDF document text
    • https://kadekorik.weebly.com/uploads/1/3/1/4/131453454/747785.pdfIn PDF document text
    • http://luxshop21.site/kukavp78oa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479235/normal_5fe2c783cef4b.pdfIn PDF document text
    • https://nadarikiwuxat.weebly.com/uploads/1/3/2/7/132712530/vipelizovedede_netotelu_watefomapati_ratipibi.pdfIn PDF document text
    • http://pornbustyvids.com/zasimadosavuzaln643j.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/kefodek/jobil.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/free_spotify_apk_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/kuxorusizilokojif.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/swahili_music_notes_sheets.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_off0000cc5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5C 5052 bytes
SHA-256: 0d4f14fa5fc6a30718dcc13be870475a3649a77677bd8a450939c1feb3d9caa0
font_01_sfnt_off0000dd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8A 10348 bytes
SHA-256: 512d1e3583ee9b10fe6816f8b5f16366a6d136e7e4ab1334fd7331ba6aa42b26

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