Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae200b4a3b835c8…

MALICIOUS

PDF

91.4 KB Created: 2021-09-14 05:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 290e39622c8eea6d9800b322ef180d3c SHA-1: eeee2d702ccdac04ed0175392ec737cc5fb7a695 SHA-256: 9ae200b4a3b835c8aef94c113f95150640d3bb8c471bd7c3ea477afd7b0a093f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=blackberry+pearl+android PDF link annotation
    • http://starroadchina.com/userfiles/file/75177766238.pdfIn PDF document text
    • http://princeverma.in/uploads/files/bobobobopabofixajura.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613575702c6cb---povumafisokatekalasije.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/b261cd1de75e9a12d4bf135329db1e99/xitubomo.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/4f96d696a5a6c0c191633209bef1d427/66683305587.pdfIn PDF document text
    • https://micsys.in/userfiles/file/wibodajajodaloxofonemuna.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/1857b36ed91d302cb8d5d77f2e8d6b9a/wefedoduwedipumen.pdfIn PDF document text
    • http://kyea.org/imageuploads/24513691291.pdfIn PDF document text
    • http://tangiahoang.com/skinkorea/Images_upload/files/82488221585.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/nenimaberidomubesupenilu.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd4b6eb408---82884540306.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/28771047815.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/29583522964.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/gto1rmgtqrptcogicpk0ipkdi6/fubigarika.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/rolabusibenekufom.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/vudurotuganitot.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/gutiminazudexaxubu.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/sazosunukevifun.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/javikitegavidovobax.pdfIn PDF document text
    • https://htcpost.vn/vietpost.vn/img_content/file/rabujitumema.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/torakitijimadaxevide.pdfIn PDF document text
    • https://activepymes.com/pub/file/74089287764.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/zafavojowetukawavojus.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/6148472473.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/64136272794.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/75324526623.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/47667655510.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_off0000fd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A7 10640 bytes
SHA-256: 499c122ead5afe203e4c88d74e34f13fe4cf66c4ffa226d336a4a75771283f5a
font_02_sfnt_off00012ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDC 19140 bytes
SHA-256: 6d75dabc007c86567d04c6cf4b2f5a83659608b15035612fa7384273793738c0

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