Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc4bd7718af7ad6…

MALICIOUS

PDF

68.7 KB Created: 2021-09-28 09:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-20
MD5: 1f0d94c281732f206ebadac748eac3c0 SHA-1: 340d8718ceecd1eb165e86c7c077cee94191ee23 SHA-256: 3bc4bd7718af7ad6d2e9770191f4c20a4622bb031d8c13830289db2b37ee85d4
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 8

  • 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 link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://queure.ru/uplcv?utm_term=stick+war+legacy+mod+apk+skin PDF link annotation
    • http://incomsistema.ru/ckfinder/userfiles/files/wofejumetomonuw.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/45285812215.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/9433030036.pdfIn PDF document text
    • http://zgic.ru/!upload/files/pedoxewosew.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/90027831688.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/govexipokalenijivane.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/31460200541.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/38910212530.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/fapizikinubatopur.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/kusufakotarujodazo.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161460f1fd25bd---dikisokogaxax.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/folubarogom.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/jabibuluzo.pdfIn PDF document text
    • https://on-the-markmarketing.onthemarkmarketing.com/userfiles/file/minadafuredujegabud.pdfIn PDF document text
    • https://superiorservicesandsolutionsfl.com/nbloom/fckuploads/file/detakavikipa.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/vokotoragusifevi.pdfIn PDF document text
    • https://mehreganimaging.com/images/upload/files/dubufeno.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16138b46040a41---47434339325.pdfIn PDF document text
    • http://patanjali.zohukum.com/ckfinder/userfiles/files/finowituxij.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/giwis.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/tivamuvujoba.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/wigugemobilepemi.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/neguvaduxuduzatenerep.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/molajubixemunofamozetew.pdfIn PDF document text
    • http://cleversystems.ru/userfiles/file/64722727736.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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0000af43.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000af43.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75A 11224 bytes
SHA-256: c99f62bc5bc0d3287276da7742885819092969cfca232acceafbde601735e70f
font_02_sfnt_off0000e178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE178 13828 bytes
SHA-256: e64ce1bc34c711d3e525c6c04671da080bb40d47de95559e116c351c92e29497