Malicious PDF — malware analysis report

Static analysis result for SHA-256 06adf63274afaaa5…

MALICIOUS

PDF

84.1 KB Created: 2021-08-14 10:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4f648969019ce24a657f866e8946a1ac SHA-1: d5fac0b6b2f28d78b9ed1a95d54319c42c5b9202 SHA-256: 06adf63274afaaa574b3f9d995a7f08a7ab42641e3d3d3517e19529cd627da54
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that redirect to various domains, likely to host malicious content or phishing pages. The presence of multiple external URIs and links to compromised CMS upload storage suggests an attempt to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://coretry.ru/uplcv?utm_term=solucionario+de+quimica+de+chang+10+edicion+pdf+espa%C3%B1ol PDF link annotation
    • http://zpb-maciejewski.pl/upload/fck/file/26371110294.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/7af3f396044268303f1586c6429cb062/rozel.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/11219551105.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/xaxumijugemosowikivito.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/f2cd9482e353a86c2654ff0d8d253969/waduluwobexopudumoni.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/95973891128.pdfIn PDF document text
    • http://lalinpress.com/ckfinder/userfiles/files/11492355749.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070646ab29da---rodadasulel.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f798cb7a20---59583967332.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d6df07b29---ruregemurajozemolofubi.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92aa6f1a8---bemeragun.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/wofoguw.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7af7359b4---53528555448.pdfIn PDF document text
    • http://beytarimcilik.com/admin/editor_resim/file/kigusukedud.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/21101044504.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/lejubaxa.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/99673172947.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/vovilileduwezivonijedasud.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/2e78ac27e66623486fa4acd884a20625/42356714895.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/22482959586.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/kudopebidavalajazusos.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_off0000de1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF631 11668 bytes
SHA-256: 1854eed70d7f7db754d37e48df2fde1da0759ebffdf2b5f8982ad6f0c2c7eb30
font_02_sfnt_off000110ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EF 18356 bytes
SHA-256: 357ec18676b1c5773e4fcb427df7b11ddf86e7919c070ec1ba594862cf766391

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