Malicious PDF — malware analysis report

Static analysis result for SHA-256 b232ccd360e5aa9e…

MALICIOUS

PDF

94.7 KB Created: 2021-07-07 03:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ecfe28a1b66f0a6a8fd5075e3879d004 SHA-1: 84511fb33f225ac7772bb6e6e36e99dee950f808 SHA-256: b232ccd360e5aa9e514bedf4e656766dd8fb5e81a938ef361223fd2335d24341
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple compromised websites, likely intended to trick users into downloading a password-protected archive. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' strongly suggests this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/8a4b1d7744721291bd84ac050e6995ac/xukikexewo.pdf In PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bc5a23969---61395195214.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/nuvopefudami.pdfIn PDF document text
    • https://photojet.bg/userfiles/file/73276778251.pdfIn PDF document text
    • https://songhong.info/userfiles/file/22435983500.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/27729331995.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/dakotufuta.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/c8bc761075feee69f65774ea42475412/68156189438.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/33355950806.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/ef2f3b518e1d46a0268f6bf638f14589/54349136815.pdfIn PDF document text
    • http://royalgroup.at/tmp/bozapadujumowesedusufot.pdfIn PDF document text
    • http://texmet.pl/userimages/file/libulenegerureluvojaga.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/97318073748.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a88a27c3f---teziwumuvazajusabu.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082c58ee62fc---rositugima.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16070e13b6f647---tirejujose.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/remepezarukulako.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/9f4467f13d5c98eac677811951d9a317/jofesavafizujo.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/19e3ef0eec9b931b3efd04e8a5e6f574/40971080616.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be2339e0ad4---tugimiza.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/resuvajazimufibuvaka.pdfIn PDF document text
    • https://rajaunited.com/contents//files/4080084420.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=traffic+flora+and+faunaPDF 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_off00011087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11087 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12899 18364 bytes
SHA-256: 8c1d2e016ee1845dc3585febf2641d7fbff69f40968d73486ad87af8e07eef86
font_02_sfnt_off00015730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15730 10132 bytes
SHA-256: a34347de56e0d64f64447a7a6a1bdf187848d72ef4c538a065c3f96c031b3a17

Open this report in the interactive analyzer, or submit your own file for analysis.