Malicious PDF — malware analysis report

Static analysis result for SHA-256 94108e445758d368…

MALICIOUS

PDF

101.1 KB Created: 2021-11-05 00:55:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: e515e1ada5241f53c8155d9d7d03c343 SHA-1: 2224fb0b929fc9530f894cd3ae08ab702986f338 SHA-256: 94108e445758d368c92e28e52b084b4b621d453ec7ccc89fd2a4bd3e5c35a266
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it uses urgency and MFA lures, and critically, requests recovery secrets or private keys, strongly suggesting credential harvesting. The numerous embedded URLs point to a link farm designed to host the phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://agrocare.hu/ckfinder/userfiles/files/jerirudopolirogubedafug.pdf In PDF document text
    • https://naves.cz/res/file/vegexigerenaduwaseneli.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/76094683492.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/50292178845.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/xipoxapanovunobe.pdfIn PDF document text
    • https://pilot-nav.socksnbows.com/ckfinder/userfiles/files/jejagutululezubujowodidi.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/74v88jrj0p4bq71jh4mf8n4bj9/19730426121.pdfIn PDF document text
    • https://piti.leaddeehub.com/userfiles/files/43658425452.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/mubozamapoxobuxugemekag.pdfIn PDF document text
    • http://isystem.hu/userfiles/file/66387068229.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/95581530748.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/89735821025.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/51854239226.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/73583103979.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/5653249764.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16179d36ee553f---vupopibaser.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/68396737198.pdfIn PDF document text
    • http://asclyziarskyklub.sk/userfiles/file/89356705929.pdfIn PDF document text
    • http://musorcentrum.around.hu/files/article/file/xoxutobipigufuw.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/75403617191.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///wituropijulajume.pdfIn PDF document text
    • https://hoavily.com/uploads/files/widofovelopenebosela.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/nazudasejib.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/99889218769.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/boguvekewesowugobojelal.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/BcFPVxLj4jw/uplcv?utm_term=encrypted+in+meaningPDF 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_off000121df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000139f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F1 19992 bytes
SHA-256: 10e23678a87ccf6706f6cf0e4cc23c6e945382b00db94024d6ae0828ca664a34
font_02_sfnt_off00016eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EEC 10620 bytes
SHA-256: f140eeceff7fce7f8854d57f198603f73c94fbfa4d72f64594475647564c3b22

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