Malicious PDF — malware analysis report

Static analysis result for SHA-256 4014047fe9cf9201…

MALICIOUS

PDF

79.6 KB Created: 2021-09-10 12:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 571c64daae62f130616dc00a9da4f577 SHA-1: 0a02dbb4ec778bfe011f7d9dfa97f1865befa1a8 SHA-256: 4014047fe9cf92011bb592bdec3baac8b23cd60620c7ebeb7a742ed2318eef49
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many pointing to potentially malicious PDF files, and one heuristic identified it as a link farm on disposable hosting. The primary attack pattern involves directing users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://0922.sproname.com/files/userfiles/files/kuxubogukedobufalub.pdf In PDF document text
    • http://hvpeds.com/upload/contents/file/31750754820.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/jilepefumoros.pdfIn PDF document text
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/57671761051.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/gusinaragasulo.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///17386163530.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/72944813778.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/161368e256622a---detozesik.pdfIn PDF document text
    • http://veitali.com/upload/files/24461424819.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/waweritedet.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/40286099658.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/96324435026.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/t9ses0d6srniou0ct07kkjqmog/tomuxuzobu.pdfIn PDF document text
    • https://eastmangroup.org/ckfinder/userfiles/files/puwukobonuzeru.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/nexiwawapivelibe.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/23210814335.pdfIn PDF document text
    • http://napiarsaigh.com/images/muwobaf.pdfIn PDF document text
    • https://wsbtitan.com/images/file/36078123590.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/7562114643.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/kiwenupixasa.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/xokulizukubo.pdfIn PDF document text
    • https://newfrio.com/userfiles/files/fekaxuf.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/vumuxakozovumut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=android+mobile+to+desktop+internet+connectionPDF link annotation
    • 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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD289 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA0 10724 bytes
SHA-256: 041357c48815fc0ab794db46ccf55ba76a13421cd024c28d3ba11a8eaec9fb40
font_02_sfnt_off00010300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10300 17672 bytes
SHA-256: 76467601f299354998a12e5e4c3c3f71034dadd29a35258b427d2e3a12e4a1ad