Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2bdac7b9ac2966…

MALICIOUS

PDF

85.5 KB Created: 2021-09-15 11:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 54fccaec2bd54d6df3428c6f04514cba SHA-1: bddfcfc480477c4c623593c3f46b7d3a8d951c24 SHA-256: 2e2bdac7b9ac29665c9b1535e70f8c3381cc1d3ff2cd2cecc8fe42365276ad13
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The presence of these links indicates an attempt to direct users to potentially malicious external sites, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.adarshvidhyasankul.org/userfilesfile/36212394820.pdf In PDF document text
    • http://plenaseguroseprevidencia.com/fotosempresa/files/mibokelalisukafadur.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/ketazakivuxifod.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/dc5d4e7bf018eee938ded1e20a0470b1/4438092578.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090711265917.pdfIn PDF document text
    • http://synhbio.com/upload/files/wowofefowul.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8372acb4d---podofuroje.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///limuvagotaxokopej.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/161365c6b41bc2---51130862049.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcc67aeade---18472659495.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/gaparafa.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/wamipuzipuxebaxoti.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/161327871576a8---gabevasomug.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/75781851487.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c95409339c---vebefexot.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/5792429558.pdfIn PDF document text
    • http://travelspace.pl/userfiles/file/zegiwosamixizejosifu.pdfIn PDF document text
    • http://congtyvima.com/images/Download/35631973248.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613221f624916---50159151587.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5c6f6cb39---judon.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/mavajibuwutagedu.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/35491097506.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/39430652399.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/42688796854.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/dorozediliv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=android+emulator+for+surface+pro+xPDF 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_off0000db45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 20012 bytes
SHA-256: 60f711795038b171cab212337742b09d17402292b2e71cb2fecebce2ee9dda0e
font_02_sfnt_off000127fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FA 13152 bytes
SHA-256: 3d5e91dbedf89a7caabf7228830b731e438c1a33398f44ba6b29c9f7a087eedc

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