Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee3ceb938f3d5c6…

MALICIOUS

PDF

71.5 KB Created: 2021-09-25 14:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 54b72358d6b6f01c01b30f2853864dbd SHA-1: 6a3d72292e1bbb60ebb5737af33f8bea78a84446 SHA-256: eee3ceb938f3d5c62993cc773a1836a08706a7ffc12b66fd24237c6ad680a823
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous URLs, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to lead users away from the document to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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://synerhu.ru/uplcv?utm_term=amazing+street+hack+apk PDF link annotation
    • https://tarzminder.com/resimler/files/relataxubujasud.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/23288655964.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/95693068336.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16130404328011---fajiwolafopitimoxuzex.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/36595606596.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/830df4adc9b6e8aa67860c80b177a3e3/39505327083.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/60929236217.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109121151172900.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/furejasala.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wizafusivimalerijuviv.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/bcfabe6720cd8b3f90058a6f3c707895/folapuzerifame.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/55338383997.pdfIn PDF document text
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/gedugolaxejapetol.pdfIn PDF document text
    • http://linza-market.ru/upload/files/tivimesisuforotisiditu.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/salozopinegiduxubaroriv.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wanove.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/godaxoriwufowizumaruzitef.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1614ee8cc8ac0d---48886953351.pdfIn PDF document text
    • http://bivalyracing.hu/files/file/pabiguzibiwi.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161347cce8d550---jober.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/vatesatusaruvu.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/vikese.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/seguziwipenitezolaramulak.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 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_off0000b35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB35C 17696 bytes
SHA-256: 2b06ff7ac808fdc2df3b13915f2491de14e2b6b484f6c39201e8c85024ddfe1c
font_01_sfnt_off0000dfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDE 10788 bytes
SHA-256: 49e9ba5c6b2d09e35fa67c3336bfead6163c62c55795f90d285b7aa5f1b96aea
font_02_sfnt_off0000f89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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